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**United      States Securities and Exchange Commission**

**Form      10-QSB**

| x      | **QUARTERLY                REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE** |   |
|--------|----------------------------------------------------------------------------|--------|
|   | **SECURITIES                EXCHANGE ACT OF 1934**                         |   |

| **o**  | **TRANSITION                REPORT UNDER SECTION 13 OR 15(d) OF THE** |   |
|--------|-----------------------------------------------------------------------|--------|
|   | **SECURITIES                EXCHANGE ACT OF 1934**                    |   |

**ATLAS      AMERICA SERIES 25 - 2004 (B) L.P.**

| **Delaware**                                                                                 | **34-1980376**                                                           |
|----------------------------------------------------------------------------------------------|--------------------------------------------------------------------------|
| (State                or other jurisdiction of incorporation                or organization) | (I.R.S.                Employer Identification                No.)  |

| 311                Rouser Road                          |                      |
|---------------------------------------------------------|---------------------------|
| Moon                Township, PA                        | 15108                     |
| (Address                of principal executive offices) | (Zip                code) |

**(412)      262-2830**

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**INDEX      TO QUARTERLY REPORT**

**ON      FORM 10QSB**

|                          |                                                                                                                               | **PAGE**                                 |
|-------------------------------|------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------|
| **PART                  I.**  | **FINANCIAL                  INFORMATION**                                                                                         |                                     |
|                          |                                                                                                                               |                                     |
| Item                  1.      | Financial                  Statements                                                                                              |                                     |
|                          |                                                                                                                               |                                     |
|                          | Balance                  Sheets as of June 30, 2005 and December 31, 2004                  (Unaudited)                             | 3                                        |
|                          |                                                                                                                                    |                                     |
|                          | Statement                  of Operations for the Three and Six Months                  ended June 30, 2005 (Unaudited)             | 4                                        |
|                          |                                                                                                                               |                                     |
|                          | Statement                  of Partners’ Capital Accounts for the Six Months ended June                  30, 2005 (Unaudited) | 5                                        |
|                          |                                                                                                                               |                                     |
|                          | Statement                  of Cash Flows for the Six Months ended June                  30, 2005 (Unaudited)                       | 6                                        |
|                          |                                                                                                                               |                                     |
|                          | Notes                  to Financial Statements                  (Unaudited)                                                        | 7                  -                  10 |
|                          |                                                                                                                               |                                     |
| Item                  2.      | Management’s                  Discussion and Analysis of Financial                  Condition and Results of Operations      | 11                  - 12                 |
|                          |                                                                                                                               |                                     |
| Item                  3.      | Controls                  and Procedures                                                                                           | 13                                       |
|                          |                                                                                                                               |                                     |
| **PART                  II.** | **OTHER                  INFORMATION**                                                                                             |                                     |
|                          |                                                                                                                               |                                     |
| Item                  6.      | Exhibits                                                                                                                           | 13                                       |
|                          |                                                                                                                               |                                     |
|                          |                                                                                                                               |                                     |
| **SIGNATURES**                | 14                                                                                                                                 |
|                          |                                                                                                                               |
| **CERTIFICATIONS**            | 15                  - 18                                                                                                           |

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**PART      I**

**ITEM      1.**
**FINANCIAL      STATEMENTS**

**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**BALANCE      SHEETS**

**(Unaudited)**

|                                                       |   | **June                30,** |       | **December                31,** |   |
|------------------------------------------------------------|--------|-----------------------------|------------|---------------------------------|--------|
|                                                       |   | **2005**                    |       | **2004**                        |   |
|                                                       |   |                        |       |                            |   |   |   |
| **ASSETS**                                                 |   |                        |       |                            |   |   |   |
| Current                Assets:                             |   |                        |            |                            |   |   |   |
| Cash                and cash equivalents                   |   | $                           | -          |                            | $      | 100 |   |
| Accounts                receivable - affiliate             |   |                        | 2,414,200  |                            |   | 764,300 |   |
| Total                current assets                        |   |                        | 2,414,200  |                            |   | 764,400 |   |
|                                                       |   |                        |       |                            |   |   |   |
| Oil                and gas properties (successful efforts) |   |                        | 43,887,300 |                            |   | 43,805,300 |   |
| Less                accumulated depletion and depreciation |   |                        | (2,882,400 | )                               |   | (630,200 | ) |
|                                                       |   |                        | 41,004,900 |                            |   | 43,175,100 |   |
|                                                       |   | $                           | 43,419,100 |                            | $      | 43,939,500 |   |
|                                                       |   |                        |       |                            |   |   |   |
| **LIABILITIES                AND PARTNERS’ CAPITAL** |   |                        |       |                            |   |   |   |
| Current                liabilities:                        |   |                        |       |                            |   |   |   |
| Accrued                liabilities                         |   | $                           | 15,300     |                            | $      | 2,800 |   |
| Total                current liabilities                   |   |                        | 15,300     |                            |   | 2,800 |   |
|                                                       |   |                        |       |                            |   |   |   |
| Asset                retirement obligation                 |   |                        | 1,026,900  |                            |   | 997,000 |   |
|                                                       |   |                        |       |                            |   |   |   |
|                                                       |   |                        |       |                            |   |   |   |
| Partners’                capital:                    |   |                        |       |                            |   |   |   |
| Managing                General Partner                    |   |                        | 11,502,700 |                            |   | 11,387,800 |   |
| Investor                Partners (1,265.38 units)          |   |                        | 30,874,200 |                            |   | 31,551,900 |   |
|                                                       |   |                        | 42,376,900 |                            |   | 42,939,700 |   |
|                                                       |   | $                           | 43,419,100 |                            | $      | 43,939,500 |   |

** **

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**STATEMENTS      OF OPERATIONS**

**(Unaudited)**

|                                                                |   | **Three                Months Ended** |      | **Six                Months Ended** |   |
|---------------------------------------------------------------------|--------|---------------------------------------|-----------|-------------------------------------|--------|
|                                                                |   | **June                30,**           |      | **June                30,**         |   |
|                                                                |   | **2005**                              |      | **2005**                            |   |
| **REVENUES:**                                                       |   |                             |      |                           |   |
| Natural                gas and oil sales                            |   | $                                     | 2,240,600 |                                | $      | 3,463,800 |   |
| Total                revenues                                       |   |                                  | 2,240,600 |                                |   | 3,463,800 |   |
|                                                                |   |                                  |      |                                |   |   |   |
| **COSTS                AND EXPENSES:**                              |   |                                  |      |                                |   |   |   |
| Production                expenses                                  |   |                                  | 223,800   |                                |   | 345,800 |   |
| Depletion                and depreciation of oil and gas properties |   |                                  | 1,447,100 |                                |   | 2,252,200 |   |
| Accretion                of asset retirement obligation             |   |                                  | 15,000    |                                |   | 29,900 |   |
| General                and administrative expenses                  |   |                                  | 44,500    |                                |   | 67,700 |   |
| Total                expenses                                       |   |                                  | 1,730,400 |                                |   | 2,695,600 |   |
| **Net                earnings**                                     |   | $                                     | 510,200   |                                | $      | 768,200 |   |
|                                                                |   |                                  |      |                                |   |   |   |
|                                                                |   |                                  |      |                                |   |   |   |
|                                                                |   |                                  |      |                                |   |   |   |
|                                                                |   |                                  |      |                                |   |   |   |
| **Allocation                of net earnings:**                      |   |                                  |      |                                |   |   |   |
|                                                                |   |                                  |      |                                |   |   |   |
| Managing                general partner                             |   | $                                     | 345,100   |                                | $      | 527,500 |   |
| Investor                partners                                    |   | $                                     | 165,100   |                                | $      | 240,700 |   |
| Net                earnings per investor partnership unit           |   | $                                     | 130       |                                | $      | 190 |   |

** **

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**STATEMENT      OF PARTNERS’ CAPITAL ACCOUNTS**

**FOR      THE SIX MONTHS ENDED June 30, 2005**

**(Unaudited)**

|                                                      |   |         |       |         |   |       |   |
|-----------------------------------------------------------|--------|--------------|------------|--------------|--------|------------|--------|
|                                                      |   | **Managing** |       |         |   |       |   |
|                                                      |   | **General**  |       | **Investor** |   |       |   |
|                                                      |   | **Partner**  |       | **Partners** |   | **Total**  |   |
| **Balance                  at January 1, 2005**           |   | $            | 11,387,800 |         | $      | 31,551,900 |   | $ | 42,939,700 |   |
|                                                      |   |         |       |         |   |       |   |   |   |   |
| Participation                  in revenues and expenses:  |   |         |       |         |   |       |   |   |   |   |
| Net                  production revenues                  |   |         | 1,091,300  |         |   | 2,026,700  |   |   | 3,118,000 |   |
| Depletion                  and depreciation               |   |         | (529,600   | )            |   | (1,722,600 | )      |   | (2,252,200 | ) |
| Accretion                  of asset retirement obligation |   |         | (10,500    | )            |   | (19,400    | )      |   | (29,900 | ) |
| General                  and administrative               |   |         | (23,700    | )            |   | (44,000    | )      |   | (67,700 | ) |
| Net                  earnings                             |   |         | 527,500    |         |   | 240,700    |   |   | 768,200 |   |
|                                                      |   |         |       |         |   |       |   |   |   |   |
| Additional                  MGP contribution:             |   |         |       |         |   |       |   |   |   |   |
| Tangible                  equipment                       |   |         | 81,900     |         |   | -          |   |   | 81,900 |   |
|                                                      |   |         |       |         |   |       |   |   |   |   |
| Distributions                                             |   |         | (494,500   | )            |   | (918,400   | )      |   | (1,412,900 | ) |
|                                                      |   |         |       |         |   |       |   |   |   |   |
| **Balance                  at June 30, 2005**             |   | $            | 11,502,700 |         | $      | 30,874,200 |   | $ | 42,376,900 |   |
|                                                      |   |         |       |         |   |       |   |   |   |   |

** **

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**ATLASAMERICA      SERIES 25 - 2004(B)      L.P.**

**(A      Delaware Limited Partnership)**

**STATEMENT      OF CASH FLOWS **

**(Unaudited)**

|                                                                                                              |   | **Six                Months Ended** |       |
|-------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------|------------|
|                                                                                                              |   | **June                30,**         |       |
|                                                                                                              |   | **2005**                            |       |
| **Cash                flows from operating activities:**                                                          |   |                                |       |   |
| Net                earnings                                                                                       |   | $                                   | 768,200    |   |
| Adjustments                to reconcile net earnings to net cash provided by operating                activities: |   |                                |       |   |
| Depletion                and depreciation                                                                         |   |                                | 2,252,200  |   |
| Accretion                of asset retirement obligation                                                           |   |                                | 29,900     |   |
| Increase                in accounts receivable - affiliate                                                        |   |                                | (1,649,900 | ) |
| Increase                in accrued liabilities                                                                    |   |                                | 12,500     |   |
| Net                cash provided by operating activities                                                          |   |                                | 1,412,900  |   |
|                                                                                                              |   |                                |       |   |
| **Cash                flows from financing activities:**                                                          |   |                                |       |   |
| Partners                distribution                                                                              |   |                                | (1,412,900 | ) |
| Return              of initial cash to Managing General              Partner                                      |   |                                | (100       | ) |
| Net                cash used in financing activities                                                              |   |                                | (1,413,000 | ) |
|                                                                                                              |   |                                |       |   |
| Net                decrease in cash and cash equivalents                                                          |   |                                | (100       | ) |
| Cash                and cash equivalents at beginning of period                                                   |   |                                | 100        |   |
| Cash                and cash equivalents at end of period                                                         |   | $                                   | -          |   |
|                                                                                                              |   |                                |       |   |
|                                                                                                              |   |                                |       |   |
| **Supplemental                Schedule of noncash investing & financing                activities**:          |   |                                |       |   |
| Tangible                equipment contributed by the                                                              |   |                                |       |   |
| Managing                General Partner                                                                           |   | $                                   | 81,900     |   |

** **

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**NOTES      TO FINANCIAL STATEMENTS **

**June      30, 2005**

**(Unaudited)**

**NOTE      1 **
**-**
**      BASIS OF PRESENTATION**

**NOTE      2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES**

**Receivables**

**Revenue      Recognition**

**Recently      Issued Financial Accounting Standards**

*Accounting Changes and Error Corrections *

*Accounting for Conditional      Asset Retirement Obligations*
*Accounting for Asset Retirement Obligations*

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**NOTES      TO FINANCIAL STATEMENTS **

**June      30, 2005**

**(Unaudited)**

**NOTE      2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)**

**Recently      Issued Financial Accounting Standards (continued)**

**Fair      Value of Financial Instruments**

**Asset      Retirement Obligation**

|                                                                |   | **Three                  Months****2005** |      | **Six                  Months****2005** |   |
|---------------------------------------------------------------------|--------|-------------------------------------------|-----------|-----------------------------------------|--------|
|                                                                |   |                                      |      |                                    |   |
| Asset                  retirement obligation at beginning of period |   | $                                         | 1,011,900 |                                    | $      | 997,000 |   |
| Accretion                  expense                                  |   |                                      | 15,000    |                                    |   | 29,900 |   |
| Total                  asset retirement obligation at end of period |   | $                                         | 1,026,900 |                                    | $      | 1,026,900 |   |

**Supplemental      Cash Flow Information**

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**NOTES      TO FINANCIAL STATEMENTS **

**June      30, 2005**

**(Unaudited)**

**NOTE      2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -      (Continued)**

**Credit      Risk**

**Comprehensive      Income**

**Property      and Equipment**

|                                                  |   | **At                June 30,** |       | **At                December 31,** |   |
|-------------------------------------------------------|--------|--------------------------------|------------|------------------------------------|--------|
|                                                  |   | **2005**                       |       | **2004**                           |   |
| Capitalized                costs of properties:       |   |                           |       |                               |   |   |   |
| Proved                properties                      |   | $                              | 1,033,000  |                               | $      | 1,033,000 |   |
| Wells                and related equipment            |   |                           | 42,854,300 |                               |   | 42,772,300 |   |
|                                                  |   |                           | 43,887,300 |                               |   | 43,805,300 |   |
|                                                  |   |                           |       |                               |   |   |   |
| Accumulated                depreciation and depletion |   |                           | (2,882,400 | )                                  |   | (630,200 | ) |
|                                                  |   | $                              | 41,004,900 |                               | $      | 43,175,100 |   |

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**ATLAS      AMERICA SERIES 25 - 2004(B) L.P.**

**(A      Delaware Limited Partnership)**

**NOTES      TO FINANCIAL STATEMENTS **

**June      30, 2005**

**(Unaudited)**

**NOTE      3 **
**-**
**      TRANSACTIONS WITH ATLAS RESOURCES, INC. AND ITS AFFILIATES**

|   | · | Administrative                costs which are included in general and administrative expenses in                the                Statement of Operations are payable to Atlas at $75 per well per                month.                Administrative costs incurred for the three and six months ended                June 30,                2005 were $20,800 and $34,300,                respectively. |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | Monthly                well supervision fees which are included in production expenses in                the                Statement of Operations are payable to Atlas at $275 per well per                month                for operating and maintaining the wells. Well supervision fees incurred                for the three and six months ended June 30, 2005 were $77,500 and                $125,400, respectively. |
|--------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | Transportation                fees which are included in production expenses in the Statement of                Operations are payable to Atlas at $.29-$.35 per mcf (one thousand                cubic                feet). Transportation costs incurred for the three and six months                ended                June 30, 2005 were $71,600 and $116,200, respectively. |
|--------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | Tangible                costs contributed by the managing general partner which are included                in                the Statement of Cash Flows for the six months ended June 30, 2005                were                $81,900. |
|--------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**Major      Customers**

**Subordination      of Managing General Partner’s Revenue Share**

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**ITEM      2. MANAGEMENT’S DISCUSSION AND ANALYSIS AND RESULTS      OF      OPERATIONS (UNAUDITED)**

**Forward-Looking      Statements**

**Results      of Operations**

|                                                                 |   | **Three                Months Ended** |        | **Six                Months Ended** |   |
|----------------------------------------------------------------------|--------|---------------------------------------|-------------|-------------------------------------|--------|
|                                                                 |   | **June                30,**           |        | **June                30,**         |   |
|                                                                 |   | **2005**                              |        | **2005**                            |   |
| Production                revenues (in thousands):                   |   |                                  |        |                                |   |   |   |
| Gas                                                                  |   | $                                     | 1,976       |                                | $      | 3,066 |   |
| Oil                                                                  |   | $                                     | 265         |                                | $      | 398 |   |
|                                                                 |   | $                                     | 2,241  |                                | $      | 3,464  |   |
| Production                volumes:                                   |   |                                  |        |                                |   |   |   |
| Gas                (thousands of cubic feet (“mcf”)/day) |   |                                  | 3,031       |                                |   | 2,365 |   |
| Oil                (barrels (“bbls”)/day)                |   |                                  | 56          |                                |   | 45 |   |
|                                                                 |   |                                  |        |                                |   |   |   |
| Average                sales prices:                                 |   |                                  |        |                                |   |   |   |
| Gas                (per mcf)                                         |   | $                                     | 7.16        |                                | $      | 7.16 |   |
| Oil                (per bbl)                                         |   | $                                     | 51.79       |                                | $      | 49.03 |   |
|                                                                 |   |                                  |        |                                |   |   |   |
| Average                production costs:                             |   |                                  |        |                                |   |   |   |
| As                a percent of sales                                 |   |                                  | 10          | %                    |   | 10 | % |
| Per                mcf equivalent unit ("mcfe")                      |   | $                                     | .73         |                                | $      | .73 |   |
|                                                                 |   |                                  |        |                                |   |   |   |
| Depletion                per mcfe                                    |   | $                                     | 4.72        |                                | $      | 4.72 |   |

----

**Liquidity      and Capital Resources**

**Critical      Accounting Policies**

**Recently      Issued Financial Accounting Standards    **

*Accounting Changes and Error Corrections *

*Accounting for Conditional      Asset Retirement Obligations*
*Accounting for Asset Retirement Obligations*

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**ITEM      3. CONTROLS AND PROCEDURES**

**Evaluation      of Disclosure Controls and Procedures**

**PART      II. OTHER INFORMATION**

**ITEM      6. Exhibits**

**EXHIBIT      INDEX**

| **Exhibit                No.** | **Description**                                                                                                                                                     |
|--------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                           |                                                                                                                                                                |
| 31.1                           | Certification                Pursuant to Rule 13a-14/15(d)-14.                                                                                                      |
| 31.2                           | Certification                Pursuant to Rule 13a-14/15(d)-14.                                                                                                      |
| 32.1                           | Certification                Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                906 of                the Sarbanes-Oxley Act of 2002 |
| 32.2                           | Certification                Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                906 of                the Sarbanes-Oxley Act of 2002 |

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**SIGNATURES**

| By: | (Signature                and Title): | Atlas                Resources, Inc., Managing General                Partner |
|-----|---------------------------------------|-------------------------------------------------------------------------------|

| By     | (Signature                and Title): | /s/                Freddie M. Kotek                                  |
|--------|---------------------------------------|----------------------------------------------------------------------|
|   |                                  | Freddie                M. Kotek, Chairman of the Board of Directors, |
|   |                                  | Chief                Executive Officer and President                 |

| By     | (Signature                and Title): | /s/                Freddie M. Kotek                                  |
|--------|---------------------------------------|----------------------------------------------------------------------|
|   |                                  | Freddie                M. Kotek, Chairman of the Board of Directors, |
|   |                                  | Chief                Executive Officer and President                 |

| By     | (Signature                and Title): | /s/                Nancy J. McGurk                                                 |
|--------|---------------------------------------|------------------------------------------------------------------------------------|
|   |                                  | Nancy                J. McGurk, Senior Vice President,                             |
|   |                                  | Chief                Financial Officer and Chief Accounting                Officer |

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