The aim of this paper is to gain perspective on the social climate found in Quebec’s provincial correctional facilities since the introduction of an indoor smoking ban. Data was collected from 113 inmates incarcerated in three provincial correctional facilities, using a mixed methods design. Quantitative data were analyzed using descriptive and comparative statistics, while qualitative data were the object of a thematic analysis. Results from the study show that inmates, for the most part in disagreement with the new regulation banning indoor smoking, believe its implementation has played a role in increasing social tensions and cigarette trafficking, as well as contributing to a rise in the price of cigarettes on the black market. Depending on their position and influence within the prison environment, this situation was perceived to be either profitable or detrimental to the inmates. The initial hypothesis that the implementation of a new regulation on tobacco use would disrupt the prison’s social climate is supported by the results obtained from this study.