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**                                    Registration No.333-109182 424 (b)(3)**

**                                     PricingSupplement No:406 Cusip:14912L2U4**

**                                     Dated:August 29, 2005    **

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***Caterpillar Financial Services Corporation***

***Medium-Term Notes, Series F***

***(Fixed Rate)***

***    With Maturities of 9 Months or More from Date of Issue***

***Interest payable each March 01 and September 01 and at Maturity***

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**Principal Amount:       Interest Rate:                Proceed Amount:**

**$250,000,000               4.500%                     $249,200,000                                         **

**Original Issue Date:    Commission Fee:               Maturity Date:**

**08/31/05      $625,000                     09/01/08                  **

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**Dealer:**

# **Citigroup Global Markets Inc. ($118,750 mm) *Bill and Deliver $250M)**

**(DTC #274)**

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**Goldman, Sachs & Co. ($118,750 mm)**

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**Merrill Lynch ($12,500 mm)**

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**Specified Currency:     Option to Elect Payment       Authorized Denominations**

**x****U.S. dollars          in U.S. dollars               (only applicableif**

**_ Other:___________     (only applicable if           Specified Currency is**

**                        Specified Currency is         other thanU.S.**

**                        other than U.S. dollars):     N/A    **

**                           N/A                             **

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**The Note isa:                                        Exchange RateAgent          X GlobalNote                                     (if other thanFirst   **

**        CertificatedNote                                Trust New York): N/A         (onlyapplicable if**

**       SpecifiedCurrency                               **

**       is other than U.S.dollars)                                                                            **

**Original Issue           Total Amount of OID: N/A    Terms of Amortizing     DiscountNote:                                       Notes:  N/A**

** ****  Yes      x No          Issue Price(expressed                **

**                         as a percentage of   **

**                         aggregate principal**

**                         amount):  99.930%**

**                       **

**                                            **

**                                                     **

**Redemption Date(s) (including                        Redemption Price(s): N/A any applicable regularor                             **

**special record dates): N/A**

**                                       **

**Repayment Date(s) (including                         Repayment Price(s): N/A any applicable regularor**

**special record dates): **

**N/A**

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**Interest Rate Reset Option:  _ Yes    X No**

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**Optional Reset Dates (only applicable if option to reset interest rate):  N/A**

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**Basis for Interest Rate Reset (only applicable if option to reset interest rate): N/A**

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**Stated Maturity Extension Option:  _ Yes    x No**

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**Extension Period(s) and Final Maturity Date (only applicable if option to extend stated maturity): N/A**

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**Basis for Interest Rate During Extension Period (only applicable if option to extend stated maturity): N/A**

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**Historical Exchange Rate (only applicable if Specified Currency other than U.S. dollars): N/A**

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**     “The interest rates on the Notes may be changed by Caterpillar Financial**

**Services Corporation from time to time, but any such change will not affect**

**the interest rate on any Notes offered prior to the effective date of the**

**change.   After the issuance of the Notes covered by this Pricing Supplement,**

**$146 mm principal amount of Notes remain available for sale pursuant to**

**the accompanying Prospectus Supplement.” **

_________________________________

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**    Pricing Supplement to Prospectus Supplement dated November 06, 2003**

**        and Prospectus dated October 15, 2003**