The Mental Health Community Group (MHCG) is a care strategy developed at a Day-Hospital (DH). It is an open, single-session group that aims to promote mental health through the proposal of attention to daily experiences. Among its members, there are former DH's users, who attend MHCG on a regular, voluntary and active way for a period of more than two years, which characterizes a regular continued participation. The purpose of this research is to understand the relation modes of former DH's users with the MHCG, who present regular continued participation in the Group. It is a qualitative study, which used participant observation and open interview with seven participants as instruments. The technique of thematic analysis was used for data analysis, in conjunction with a dialogue with authors who study mental health and the theoretical foundation of the MHCG to support the discussion. The analysis resulted in three main themes: the first, "'I had to learn to join the Group': the process of regular continued participation", which presented the development of regular continued participation as a process, and understands it from the history of the interviewed in different contexts of mental health care services and in the MHCG. The second theme, "'I am a simple person who helps people': finding a place through the MHCG", which emphasized experiences of place performed by regular participants from the group context, highlighting the place of being open, the place of singularity and expression of itself, and the place of protagonism and recognition. The third theme, "'Everyone is the Community Group': relationships developed with the Group", which presented the main relationships of the participants with the Group, among which it was identified empathic, community and belonging relationships, in addition to expressions of gratitude and desire to contribute to the Group, which suggests relation modes with the MHCG that support engagement in regular continued participation. Thus, it is possible to understand that maintaining the presence and participation of the people interviewed in the MHCG is associated with the development of a sense of belonging to a community in which there can be an experience of oneself and with the other, intersubjective relationships and significant repercussions in personal life of each participant. The study of people who establish a unique relationship with an open mental health promotion group, which proposes a return to the community dimension and provides attention to life experiences, contributes to the fields of research and multidisciplinary action in mental health and public health, as it broadens the understanding of subjectification processes in the community context. In the context of the MHCG, the emphasis on regular continued participation refers to an attention to microprocesses of constituting group practices, in addition to focusing on the relational environment and its relevance to the subjective human experience. This research collaborated to discussions and practices in men...