Two principal questions were addressed in the study: (a) What factors contribute to police employees’ job satisfaction and affective commitment, and (b) does job satisfaction mediate the effect of occupational stressors on affective commitment. The data for the current study were from a large research study on police job satisfaction in Taiwan. The results reported that three stressors consistently contributed to explaining police officers’ job satisfaction and occupational commitment: officers’ relationships with their peers and with their supervisors, and their perceptions about the department’s promotion system. The results also demonstrated that job satisfaction partially mediated these three significant job stressors on occupational commitment among police officers. Based on the findings reported here, both clear implications for practice and useful suggestions for future research are set forth.