The purpose of this study is to find the relationship among personality, job satisfaction, and turnover intention of part-time employees in coffee chains, and verifying the mediating effects of job satisfaction on the relationship between personality and turnover intention. It tested hypotheses through questionnaire. By the convenience sampling method, 131 returned questionnaires in total were regarded as valid (80.86% response rate). The findings have been summarized as the following: 1. Employees whose personality was more agreeable, more extraverted or less conscientious tended to have more turnover intention. 2. Employees with higher satisfaction at pay, promotions and supervision were prone to have lower turnover intention. 3. Employees with agreeableness personality had higher satisfaction at the work itself, coworkers and supervision. Employees with extraversion personality had lower satisfaction at promotions, coworkers and supervision. Employees with conscientiousness personality had higher satisfaction at pay and coworkers. 4. The satisfaction at supervision has partly mediating effects between agreeableness and turnover intention. The satisfaction at pay has partly mediating effects between conscientiousness and turnover intention. And the satisfaction at pay and supervision does act as a mediator between extraversion and turnover intention.