This paper examines the profile of workers who are willing to participate in a work sharing program by reducing their working hours. In contrast with national surveys which ask workers their intention about working hours reduction, we are dealing with Alcan's workers who have actually decided to reduce their working time. We postulate that three categories of factors may influence workers' decision about participating in a work sharing program: 1) characteristics of the job; 2) attitude toward leisure; and 3) personal and family characteristics. Among the characteristics of the job, we find that the type of job, the type of workplace, the type of schedule, and the opportunity to work overtime have an effect on the worker's decision. We also find that our variables capturing the attitude toward leisure have a significant explanatory power, as well as the age, the experience and the spouse's working status.