Professionals working at the Pediatric Transcultural Clinic at Maisonneuve-Rosemont Hospital have been using a specific tool for twenty years when working with Montreal’s culturally diverse population: the transcultural evaluation grid. The development of this tool is based on several theoretical and methodological aspects of ethno-psychiatry. It can be used for social workers to help identify and consider the impacts of migration journeys and changes in cultural references in order to better understand patients’ difficulties. It also emphasizes the importance of patients’ interpretation of their problems according to their beliefs, and personal and cultural points of view. Wider distribution of this tool could enrich social workers’ evaluation of patients from culturally diverse backgrounds.