Citizen-based Community Space (CS) is facing the continuity issues from a lack of human resources and the aging of managers. This study intends to clarify the relationship between the background experience of CS managers and their motivation for CS and consider how future participants can contribute to that. With the cooperation of 12 CSs created by Yokohama City's public subsidy, we interviewed 28 survey respondents who have worked as managers at them. As a result, five types of motivations for CS and five types of backgrounds are identified. The various relationship between motivation and background suggests the possibility of finding potential managers.