The progressive development of domestic sport industries in the recent years, main purpose of this research was to investigate the relationships between sports sponsorship and purchase behavior. The research then investigated consumer's brand identity as a mediating variable, and examined its path effect with sports sponsorship to purchase behavior. To achieve the study purpose, selecting sports sponsorship to be main research object with 298 valid samples. This study use Structural Equation Modeling (SEM) to test key factors that influence consumer's purchase behavior, sports sponsorship and brand identity. From the survey, some conclusions are summarized as follows: 1. The sports sponsorship of corporate had a positive effect on purchase behavior. 2. The sports sponsorship of corporate had a positive effect on brand identity. 3. The brand identity had a positive effect on purchase behavior.