| CATERPILLAR                FINANCIAL SERVICES CORPORATIONPOWERNOTES                (R)With                Maturities of 9 months or more from Date of Issue |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Registration                No. 333-124310                                                                                                                  |   | Trade                Date: | 2/04/08 |
| Filed                Pursuant to Rule 424(b)(3)                                                                                                             |   | Issue                Date: | 2/07/08 |
| PRICING                SUPPLEMENT NO. 1091                                                                                                                  |   |   |   |
| (To                Prospectus Supplement dated July 7, 2005 & Prospectus dated May 13,                2005)                                             |   |   |   |
| The                Date of this Pricing Supplement: February 4, 2008                                                                                        |   |   |   |
|                                                                                                                                                        |   |   |   |

|                              |                            |                                         |                                            |                           |                     |                                             |   |                      |   |                     |   |            |   |   |   |                                                                                                                                                                                               |
|-----------------------------------|---------------------------------|----------------------------------------------|-------------------------------------------------|--------------------------------|--------------------------|--------------------------------------------------|--------|---------------------------|--------|--------------------------|--------|-----------------|--------|--------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| CUSIP                orCommonCode |                            | StatedInterestRate                (1)        |                                            | Maturity                       |                     | Price                toPublic                (2) |   | Discounts&Commissions |   | InterestPaymentFrequency |   | SurvivorsOption |   | Yes/No |   | SUBJECT                TO REDEMPTION OR REPAYMENTDate                and terms of redemption or repayment (including any applicable regular                or                special record dates) |
| 14912HHY9                         |                            |     4.25%                |                                            | 8/15/13                        |                     | 100%                                             |   | 1.16%                     |   | Monthly                  |   | YES             |   | N/A    |   |                                                                                                                                                                                               |
|                              |                            |                                         |                                            |                           |                     |                                             |   |                      |   |                     |   |            |   |   |   |                                                                                                                                                                                               |
|                              |                            |                                         |                                            |                           |                     |                                             |   |                      |   |                     |   |            |   |   |   |                                                                                                                                                                                               |
|                              |                            |                                         |                                            |                           |                     |                                             |
|                              | Principal                Amount | Proceeds                                     | Dealer                (4)                       | 1stPayment                Date | Day                Count |                                             |
|                              |                            |                                         |                                            |                           |                     |                                             |
|                              | $33,195,000.00                  | $32,809,938.00                               | LaSalle                Financial Services, Inc. | 3/15/08                        | 30/360                   |                                             |
|                              |                            |                                         |                                            |                           |                     |                                             |
|                              | Yield                (3)        | Moody’s                /S&P Rating |                                            |                           |                     |                                             |
|                              |                            |                                         |                                            |                           |                     |                                             |
|                              | 4.288%                          | A2/A                                         |                                            |                           |                     |                                             |

|                                         |   |                      |   |   |   |                                      |   |
|----------------------------------------------|--------|---------------------------|--------|--------|--------|-------------------------------------------|--------|
| Original                Issue Discount Note: |   | Yes o No x |   |   |   | Total                Amount of OID:  | N/A    |

|   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |   |   |   |
|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|
| (1)    | The                interest rates on the PowerNotes ® may be changed by Caterpillar Financial                Services Corporation from time to time, but any such change will                not                affect the interest rate on any PowerNotes ® offered prior to the                effective date of the change.  After the issuance of the                PowerNotes® covered by this Pricing Supplement, $743.617 mm principal                amount of PowerNotes® remain available for sale pursuant to the                accompanying Prospectus Supplement. |
| (2)    | Expressed                as a percentage of aggregate principal amount.  Actual Price to                Public may be less, and will be determined by prevailing market prices                at                the time of purchase as set forth in the confirmation sheet.                                                                                                                                                                                                                                                                                                                         |
| (3)    | Yields                are quoted on a semi-annual bond equivalent yield basis.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
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| (4)    | As                of September 12, 2005 ABN AMRO Financial Services, Inc. changed its                name                to LaSalle Financial Services, Inc. Consequently, all references                to “ABN                AMRO Financial Services, Inc.” in the prospectus are amended to read                “LaSalle Financial Services, Inc.”.                                                                                                                                                                                                                                |