The Manufacturers' Mutual Accident Insurance Association Limited was an Australian insurance company founded in 1914 primarily targeting the Workers' Compensation market.

It was renamed Manufacturers Mutual Insurance, abbreviated MMI in 1920.

The final acquisition was in 1993 for Switzerland Insurance Australia Limited.

The company was known for its subsidiary lines, starting in 1987 with Combrook Pty Limited, an injury rehabilitation provider, and 1997 introducing DirecDial Financial Services Limited and SafetyNet Services Pty Ltd. DirecDial and SafetyNet was later integrated within the mainline businesses.

Combrook was never integrated and remained a separate company as Workers' Compensation legislation prohibits insurance companies from also being the rehabilitation provider due to conflict of interest.