Objective: The aim of this research was studying the effectiveness of false belief training on acquiring theory of mind in 8-11 years old boys with intellectual disabilities (ID). Method: Utilizing a quasi-experimental design, 30 students were selected after accomplishment of pretest (they did not have the ability to understand theory of mind). Then, they were randomly divided into two equal groups, after matching in age and intelligence. Experimental group was trained for 8 sessions. Post test was administered immediately after intervention and also after 2 week as a follow up stage. Results: Data analysis using Kolmogorov–Smirnov test, independent t-test and revealed that the experimental group had a better result (pConclusion: This study concluded that false belief training can enhance theory of mind in students with ID.