Form: SC 13G

Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

November 12, 2002

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EXHIBIT (99.1)


JOINT FILING AGREEMENT

        In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, the undersigned agree to the joint filing of a Statement on Schedule 13G (including any and all amendments thereto) with respect to the Common Stock, $0.04 par value, of ResMed Inc. and further agree to the filing of this agreement as an Exhibit thereto. In addition, each party to this Agreement expressly authorizes each other party to this Agreement to file on its behalf any and all amendments to such Statement on Schedule 13G.

Date: November 12, 2002          
    WESTPAC BANKING CORPORATION
           
    By:   /s/  JULIE ELIZABETH THORBURN      
        Name: Julie Elizabeth Thurburn
        Title: Attorney
           
    WESTPAC EQUITY HOLDINGS PTY LIMITED
           
    By:   /s/  LINDA RENAY LA HOOD      
        Name: Linda Renay La Hood
        Title: Secretary
           
    WESTPAC FINANCIAL SERVICES GROUP LIMITED
           
    By:   /s/  JULIE ELIZABETH THORBURN      
        Name: Julie Elizabeth Thurburn
        Title: Secretary


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JOINT FILING AGREEMENT