In this research, leisure activity engagement of students with intellectual disabilities was examined. This study aims to compare the engagement of students with intellectual disability in leisure time activities that they chose with the ones that were selected by their teachers. Four students diagnosed with intellectual disability at the age of fifteen participated in this study. While the dependent variable of the study is the students' engagement in the leisure time activities, the independent variables are the students’ and their teachers’ leisure time activity selections. The study was designed according to the alternating treatments model, which is one of the single subject research models. The study has revealed that enabling students to choose the leisure activities is more effective in increasing the engagement of three out of four participants in those activities.