This research aimed to (1) perform inventory self-concept of students, and (2) measuring students' self-concept based on gender. Data analysis used Rasch model for 45 students with actual power measurement 0,84. The research findings showed (1) inventory self-concept had been fit with the theoretic model, and (2) male students had a tendency to a higher self-concept rather than female students. The implications of this study were the need to increase students' self-concept and improve productivity of students. In addition, the results of this research could be the preliminary data to determine the types of services to solve problems of self-concept of students and positive direction by making counselling program based on students' need assessment.