This study, on effects of brand association and consciousness risk on business managers' purchase intentions, sets as its targets of census the members of the supervisors of the Taiwan junior chamber from Taichung county and city of, and its object of study on the five major domestic brands of passenger vehicles. A total of 425 copies of questionnaires were delivered by mail, and 191 copies were retrieved valid, the rate of valid retrieval is 45%. The study finds the followings: (1) The relations between brand association and purchase intention of business managers are extremely conspicuous, (2) The relations between consciousness risk and purchase intention of business managers are extremely conspicuous, (3) The effects of business managers' brand associations on their consciousness risks are extremely conspicuous, i.e., their brand associations indeed effect the extents of consciousness risk, (4) When analyzing the effects of the factors like brand associations and consciousness risks on managers' purchase intentions, we find that brand association (i.e., the factors of consciousness value, organizational association, brand personality, differentiation) is less influential, and that the “social risk” factor of consciousness risk is extremely conspicuous, and “physical risk” comes second. The more numb business managers' feel about ‘social risks’ and ‘physical risks’, relatively the stronger the purchase intention becomes.