The purpose of this study was to investigate factors related to the involvement of seniors in a national action-research project. Information was collected by in-depth interviews with the participants involved (n=5) in the Montreal site of the project. The elderly described six main motivations: changing things, using one’s skills and experience, working with a team, being altruistic, maintaining a status and a valued role in society and, finally, acting according to one’s philosophy and ideology of life. These data partly corroborate previous results. However, this study highlights the importance of motivations linked to pursuing activities and ways of doing things developed at work before retirement. Strategies aimed at facilitating the involvement of elderly in action-research projects are presented in the discussion.