The purpose of this study was to investigate the effects of group career counseling program for changing negative thoughts on the negative automatic thoughts of students with intellectual disabilities. A pretest-posttest design was employed. 3 middle school students and 1 high school students enrolled at a special school in J-do participated in this study. The amount of quantitative change was analyzed. In addition, the process of changes in the students’ negative thoughts were described in detail. According to the results, Negative thoughts-changing group career counseling program showed positive change in negative automatic thoughts of students with intellectual disability. As the session of the program was progressed more, the students showed some changes in the attitude to class participation, reduced frequency of using aggressive language, decrease of unpredicted/problematic behaviors, and the expression of expectancy in the next session. These positive results suggest that career counseling should be provided for psychological support of students with intellectual disabilities. In order for the students with intellectual disabilities to establish goals and plans for their future and to provide career education in order to systematically make efforts for their own career, efforts should be made in the special education field. The educational implications of this study, the necessity of activities that lead to positive thinking, the limitations with suggestions of this study such as longer experimental sessions were discussed.