This work is a research project submitted to the Postgraduate Program in Mental Health and Psychosocial Care at the Federal University of Santa Catarina to obtain a Master’s degree in Mental Health and Psychosocial Care. The study aimed to analyze the perceptions of users and professionals at the Psychosocial Care Center - CAPS II in the municipality of São José, in the state of Santa Catarina, about user assembly, making a critical reflection on the subject within the field of mental health.