The purpose of this study is to analyze the effect of work factors on sport involvement. Samples of the study are 605 adult workers of both sexes working for three different companies. Main conclusions obtained through multiple regression analysis are as follows. 1. Main variables affecting sport participation are the experience of sport participation so far, watching and listening to sport programs on TV and radio, and joining sport clubs or teams. In terms of work factors, types of the job are the most influential on sport participation. 2. Variables which affect watching and listening to TV and radio sport programs are those of marriage, sport participation and sex. Among work factors, they are stability of occupation, types of the job, creativity in the job and working hours. 3. Sport satisfaction is significantly affected by such variables as age, the desire for sport participation and sport participation itself. As for work factors, they are types of the job, working hours, creativity in the job and job satisfaction. 4. Among work factors, main variables affecting sport involvement are types of the job, identification with the working situation and job satisfaction. Self-actualization in the job is also influential on sport involvement. 5. Meisner's "spillover pattern" is recognized between work and sport involvement.