Company:  ARIBA INC
Form Type:  10-Q
Filing Date:  8/5/2011 
CIK:  0001084755 
Address:  910 HERMOSA COURT 
City, State, Zip:  SUNNYVALE, California 94085 
Telephone:  (650) 930-6200 
Fiscal Year:  09/30 
Description of Business
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  FORM 10-Q
    PART I: FINANCIAL INFORMATION
      Item 1. Financial Statements
        BALANCE SHEET
        INCOME STATEMENT
        CASH FLOW
        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
          INCOME STATEMENT
      Item 2. Management's Discussion and Analysis of Financial ...
      Item 3. Quantitative and Qualitative Disclosures About ...
      Item 4. Controls and Procedures
    PART II: OTHER INFORMATION
      Item 1. Legal Proceedings
      Item 1A. Risk Factors
      Item 2. Unregistered Sales of Equity Securities and Use of ...
      Item 3. Defaults Upon Senior Securities
      Item 5. Other Information
      Item 6. Exhibits
    SIGNATURES
  EXHIBIT 31.1
    CERTIFICATION
  EXHIBIT 31.2
    CERTIFICATION
  EXHIBIT 32.1
    CERTIFICATION PURSUANT TO