----

----

**United        States Securities and Exchange Commission**

**Washington,        D.C. 20549**

**Form        10-QSB**

| x      |   | **QUARTERLY                  REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE** |   |
|--------|--------|------------------------------------------------------------------------------|--------|
|   |   | **SECURITIES                  EXCHANGE ACT OF 1934**                         |   |
|   |   | For                  the quarterly period ended March 31, 2005               |   |
|   |   |                                                                         |   |
| 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          | (I.R.S.                  Employer    |
| incorporation                  or organization)           | Identification                  No.) |
| 311                  Rouser Road                          |                                 |
| Moon                  Township, PA                        | 15108                                |
| (Address                  of principal executive offices) | (Zip                  code)          |

**(412)        262-2830**

----

**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 March 31, 2005 and December 31, 2004                  (Unaudited)                                     | 3                                        |
|                          |                                                                                                                                        |                                     |
|                          | Statement                  of Operations for the Three Months ended March 31,                  2005 (Unaudited)                             | 4                                        |
|                          |                                                                                                                                        |                                     |
|                          | Statement                  of Partners’ Capital Accounts for the Three Months ended March 31, 2005                  (Unaudited)  | 5                                        |
|                          |                                                                                                                                        |                                     |
|                          | Statement                  of Cash Flows for the Three Months ended March 31,                  2005 (Unaudited)                             | 6                                        |
|                          |                                                                                                                                        |                                     |
|                          | Notes                  to Financial Statements                  (Unaudited)                                                                 | 7                  -                  10 |
|                          |                                                                                                                                        |                                     |
| Item                  2.      | Management’s                  Discussion and Analysis of Financial Condition                  and Results of Operations               | 10                  - 12                 |
|                          |                                                                                                                                        |                                     |
| Item                  3.      | Controls                  and Procedures                                                                                                    | 12                                       |
|                          |                                                                                                                                        |                                     |
| **PART                  II.** | **OTHER                  INFORMATION**                                                                                                      |                                     |
|                          |                                                                                                                                        |                                     |
| Item                  6.      | Exhibits                                                                                                                                    | 13                                       |
|                          |                                                                                                                                        |                                     |
| **SIGNATURES**                | 13                                                                                                                                          |
|                          |                                                                                                                                        |
| **CERTIFICATIONS**            | 14                  - 17                                                                                                                    |

----

*Table            of Contents*

**PART        I**

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

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

**(A        Delaware Limited Partnership)**

**BALANCE        SHEETS**

**(Unaudited)**

|                                                               |   | **March                  31,** |       | **December                  31,** |   |
|--------------------------------------------------------------------|--------|--------------------------------|------------|-----------------------------------|--------|
|                                                               |   | **2005**                       |       | **2004**                          |   |
|                                                               |   |                           |       |                              |   |
| **ASSETS**                                                         |   |                           |       |                              |   |
| Current                  Assets:                                   |   |                           |       |                              |   |
| Cash                  and cash equivalents                         |   | $                              | 282,300    |                              | $      | 100 |   |
| Accounts                  receivable - affiliate                   |   |                           | 1,130,100  |                              |   | 764,300 |   |
| Total                  current assets                              |   |                           | 1,412,400  |                              |   | 764,400 |   |
|                                                               |   |                           |       |                              |   |   |   |
| Oil                  and gas properties (successful efforts)  |   |                           | 43,887,200 |                              |   | 43,805,300 |   |
| Less                  accumulated depletion and depreciation  |   |                           | (1,435,300 | )                                 |   | (630,200 | ) |
|                                                               |   |                           | 42,451,900 |                              |   | 43,175,100 |   |
|                                                               |   | $                              | 43,864,300 |                              | $      | 43,939,500 |   |
|                                                               |   |                           |       |                              |   |   |   |
|                                                               |   |                           |       |                              |   |   |   |
| **LIABILITIES                  AND PARTNERS’ CAPITAL**       |   |                           |       |                              |   |   |   |
| Current                  liabilities:                              |   |                           |       |                              |   |   |   |
| Accrued                  liabilities                          |   | $                              | 10,800     |                              | $      | 2,800 |   |
| Total                  current liabilities                         |   |                           | 10,800     |                              |   | 2,800 |   |
|                                                               |   |                           |       |                              |   |   |   |
| Asset                  retirement obligation                  |   |                           | 1,011,900  |                              |   | 997,000 |   |
|                                                               |   |                           |       |                              |   |   |   |
|                                                               |   |                           |       |                              |   |   |   |
| Partners’                  capital:                          |   |                           |       |                              |   |   |   |
| Managing                  General Partner                     |   |                           | 11,498,800 |                              |   | 11,387,800 |   |
| Investor                  Partners (1,265.38 units)           |   |                           | 31,342,800 |                              |   | 31,551,900 |   |
|                                                               |   |                           | 42,841,600 |                              |   | 42,939,700 |   |
|                                                               |   | $                              | 43,864,300 |                              | $      | 43,939,500 |   |

** **

----

*Table            of Contents*

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

**(A        Delaware Limited Partnership)**

**STATEMENT        OF OPERATIONS**

**(Unaudited)**

|                                                                        |   | **Three                  Months Ended** |      |
|-----------------------------------------------------------------------------|--------|-----------------------------------------|-----------|
|                                                                        |   | **March                  31,**          |      |
|                                                                        |   | **2005**                                |      |
| **REVENUES:**                                                               |   |                                    |      |
| Natural                  gas and oil sales                                  |   | $                                       | 1,223,200 |   |
| Total                  revenues                                        |   |                                    | 1,223,200 |   |
|                                                                        |   |                                    |      |   |
| **COSTS                  AND EXPENSES:**                                    |   |                                    |      |   |
| Production                  expenses                                   |   |                                    | 122,000   |   |
| Depletion                  and depreciation of oil and gas properties  |   |                                    | 805,100   |   |
| Accretion                  of asset retirement obligation              |   |                                    | 14,900    |   |
| General                  and administrative expenses                   |   |                                    | 23,200    |   |
| Total                  expenses                                             |   |                                    | 965,200   |   |
| **Net                  earnings**                                      |   | $                                       | 258,000   |   |
|                                                                        |   |                                    |      |   |
|                                                                        |   |                                    |      |   |
|                                                                        |   |                                    |      |   |
|                                                                        |   |                                    |      |   |
| **Allocation                  of net earnings:**                            |   |                                    |      |   |
| Managing                  general partner                                   |   | $                                       | 182,400   |   |
| Investor partners                                                      |   | $                                       | 75,600    |   |
| Net                  earnings per limited partnership unit                  |   | $                                       | 60        |   |

----

*Table            of Contents*

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

**(A        Delaware Limited Partnership)**

**STATEMENT**
**        OF PARTNERS’ CAPITAL ACCOUNTS **

**FOR        THREE MONTHS ENDED March 31, 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                        |   |         | 385,400    |         |   | 715,800    |   |   | 1,101,200 |   |
| Depletion                  and depreciation                     |   |         | (189,700   | )            |   | (615,400   | )      |   | (805,100 | ) |
| Accretion                  of asset retirement obligation  |   |         | (5,200     | )            |   | (9,700     | )      |   | (14,900 | ) |
| General                  and administrative                     |   |         | (8,100     | )            |   | (15,100    | )      |   | (23,200 | ) |
| Net                  earnings                                   |   |         | 182,400    |         |   | 75,600     |   |   | 258,000 |   |
|                                                            |   |         |       |         |   |       |   |   |   |   |
| Additional                  MGP contribution:                   |   |         |       |         |   |       |   |   |   |   |
| Tangible                  equipment                        |   |         | 81,900     |         |   | -          |   |   | 81,900 |   |
|                                                            |   |         |       |         |   |       |   |   |   |   |
| Distributions                                              |   |         | (153,300   | )            |   | (284,700   | )      |   | (438,000 | ) |
|                                                            |   |         |       |         |   |       |   |   |   |   |
| **Balance                  at March 31, 2005**                  |   | $            | 11,498,800 |         | $      | 31,342,800 |   | $ | 42,841,600 |   |

----

*Table            of Contents*

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

**(A        Delaware Limited Partnership)**

**STATEMENT        OF CASH FLOWS **

**(Unaudited)**

|                                                                                                                  |   | **Three                  Months Ended** |     |
|-----------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------------|----------|
|                                                                                                                  |   | **March                  31,**          |     |
|                                                                                                                  |   | **2005**                                |     |
| **Cash                  flows from operating activities:**                                                            |   |                                    |     |
| Net                  earnings                                                                                         |   | $                                       | 258,000  |   |
| Adjustments                  to reconcile net earnings to net cash provided by operating                  activities: |   |                                    |     |   |
| Depletion                  and depreciation                                                                           |   |                                    | 805,100  |   |
| Accretion                  of asset retirement obligation                                                             |   |                                    | 14,900   |   |
| Increase                  in accounts receivable - affiliate                                                          |   |                                    | (365,800 | ) |
| Increase                  in accrued liabilities                                                                      |   |                                    | 8,000    |   |
| Net                  cash provided by operating activities                                                       |   |                                    | 720,200  |   |
|                                                                                                                  |   |                                    |     |   |
|                                                                                                                  |   |                                    |     |   |
| **Cash                  flows from financing activities:**                                                            |   |                                    |     |   |
| Partners                  distribution                                                                                |   |                                    | (438,000 | ) |
| Net                  cash used in financing activities                                                                |   |                                    | (438,000 | ) |
|                                                                                                                  |   |                                    |     |   |
| Net                  increase in cash and cash equivalents                                                       |   |                                    | 282,200  |   |
| Cash                  and cash equivalents at beginning of period                                                |   |                                    | 100      |   |
| Cash                  and cash equivalents at end of period                                                      |   | $                                       | 282,300  |   |
|                                                                                                                  |   |                                    |     |   |
|                                                                                                                  |   |                                    |     |   |
| **Supplemental                  Schedule of noncash investing & financing                  activities**:          |   |                                    |     |   |
| Tangible                  equipment contributed by the                                                                |   |                                    |     |   |
| Managing                  General Partner                                                                             |   | $                                       | 81,900   |   |

----

*Table            of Contents*

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

**(A        Delaware Limited Partnership)**

**NOTES        TO FINANCIAL STATEMENTS **

**March        31, 2005**

**(Unaudited)**

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

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

**Receivables**

**Revenue        Recognition**

**Recently        Issued Financial Accounting Standards**

----

*Table            of Contents*

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

**(A        Delaware Limited Partnership)**

**NOTES        TO FINANCIAL STATEMENTS **

**March        31, 2005**

**(Unaudited)**

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

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

**Fair        Value of Financial Instruments**

**Asset        Retirement Obligation**

|                                                                |   | **2005** |      |
|---------------------------------------------------------------------|--------|----------|-----------|
|                                                                |   |     |      |
| Asset                  retirement obligation at beginning of period |   | $        | 997,000   |   |
| Accretion                  expense                                  |   |     | 14,900    |   |
| Total                  asset retirement obligation at end of period |   | $        | 1,011,900 |   |

**Supplemental        Cash Flow Information**

----

*Table            of Contents*

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

**NOTES        TO FINANCIAL STATEMENTS **

**March        31, 2005**

**(Unaudited)**

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

**Credit        Risk**

**Comprehensive        Income**

**Property        and Equipment**

|                                                          |   | **At                  March 31,** |       |
|---------------------------------------------------------------|--------|-----------------------------------|------------|
|                                                          |   | **2005**                          |       |
| Capitalized                  costs of properties:             |   |                              |       |
| Proved                  properties                       |   | $                                 | 1,033,000  |   |
| Wells                  and related equipment             |   |                              | 42,854,200 |   |
|                                                          |   |                              | 43,887,200 |   |
|                                                          |   |                              |       |   |
| Accumulated                  depreciation and depletion  |   |                              | (1,435,300 | ) |
|                                                          |   | $                                 | 42,451,900 |   |

----

*Table            of Contents*

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

**NOTES        TO FINANCIAL STATEMENTS **

**March        31, 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 months ended March                  31, 2005                  were $13,500. |
|--------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | 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 months ended March 31, 2005 were                  $47,900. |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | 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 months ended                  March 31,                  2005 were $44,600. |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | Tangible                  costs contributed by the managing general partner for the three                  months                  ended March 31, 2005 were $81,900. |
|--------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

**Major        Customers**

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

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

**Forward-Looking        Statements**

----

*Table            of Contents*

**Results        of Operations**

|                                                                   |   | **Three                  Months Ended** |   |
|------------------------------------------------------------------------|--------|-----------------------------------------|--------|
|                                                                   |   | **March                  31,**          |   |
|                                                                   |   | **2005**                                |   |
| Production                  revenues (in thousands)                    |   |                                    |   |
| Gas                                                                    |   | $                                       | 1,090  |   |
| Oil                                                                    |   | $                                       | 133    |   |
|                                                                   |   |                                    |   |   |
| Production                  volumes:                                   |   |                                    |   |   |
| Gas                  (thousands of cubic feet (“mcf”)/day) |   |                                    | 1,692  |   |
| Oil                  (barrels (“bbls”)/day)                |   |                                    | 33     |   |
|                                                                   |   |                                    |   |   |
| Average                  sales prices:                                 |   |                                    |   |   |
| Gas                  (per mcf)                                         |   | $                                       | 7.16   |   |
| Oil                  (per bbl)                                         |   | $                                       | 44.33  |   |
|                                                                   |   |                                    |   |   |
| Average                  production costs:                             |   |                                    |   |   |
| As                  a percent of sales                                 |   |                                    | 10     | % |
| (per                  mcf equivalent unit)                             |   | $                                       | .72    |   |
|                                                                   |   |                                    |   |   |
| Depletion                  per mcfe                          |   | $                                       | 4.73   |   |

**Liquidity        and Capital Resources**

**Critical        Accounting Policies**

----

*Table            of Contents*

**Critical        Accounting Policies (continued)**

**Recently        Issued Financial Accounting Standards    **

**ITEM        3.  CONTROLS AND PROCEDURES**

**Evaluation        of Disclosure Controls and Procedures**

----

*Table            of Contents*

**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 |

**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                 |
|   |                                    |   |                                                                   |
| Date:  | June                15, 2005            |   |                                                                   |

| By     | (Signature                  and Title):     |   | /s/                  Freddie M. Kotek                                  |
|--------|---------------------------------------------|--------|------------------------------------------------------------------------|
|   |                                        |   | Freddie                  M. Kotek, Chairman of the Board of Directors, |
|   |                                        |   | Chief                  Executive Officer and President                 |
|   |                                        |   |                                                                   |
| Date:  | June                15,                2005 |   |                                                                   |
|   |                                        |   |                                                                   |
|   |                                        |   |                                                                   |
| By     | (Signature                  and Title):     |   | /s/                  Nancy J. McGurk                                   |
|   |                                        |   | Nancy                  J. McGurk, Senior Vice President,               |
|   |                                        |   | Chief                  Financial Officer and Chief Accounting Officer  |
|   |                                        |   |                                                                   |
| Date:  | June                15,                2005 |   |                                                                   |

----