Purpose: Interprofessional collaboration is necessary for handling the complex psychosocial needs of prisoners. This collaboration must be addressed to avoid high recidivism rates and the human and societal costs linked to them. Challenges are exacerbated by a linear approach to handling prisoners’ problems, silo working between welfare agencies and professional boundaries between frontline workers. There are few adequate theoretical frameworks and tools to address these challenges in the prison context. The purpose of this study is to explore the perceptions that frontline staff working in Norwegian prison facilities have regarding interprofessional collaboration in providing mental health services for prisoners. Design/methodology/approach: This study had a non-experimental, cross-sectional design to explore perceptions of interprofessional collaboration in a prison context. Descriptive and multifactorial analyses (exploratory factor analysis and confirmatory factor analysis) were used to explore the data. Findings: The analysis showed that three factors, communication, organizational culture and domain, explained 95% of the variance. Results are discussed using relational coordination, as well as the conceptual PINCOM model, as a theoretical framework. Originality/value: Few studies explicitly explore collaboration between professionals in mental health and prison services despite its being a prerequisite to achieving sufficient services for prisoners. To our knowledge, this current study is one of the first in Norway to explore collaboration in a prison context by analysing quantitative data and focusing on frontline workers perception of the phenomenon. Keywords: interprofessional collaboration, Norwegian prisons, relational coordination, PINCOM-Q, forntline workers