The purpose of this study is to examine what effects transition education program have on mentally handicapped students’ career preparation and career interest. The program is designed to prepare mentally handicapped students to enter into society after graduation and have careers that are appropriate to their ability and function to be able to manage their lives and to raise interest in career that makes them to sustain their careers. The result of this study can be summarized as follows. First, application of transition program connected to community raised career interest of mentally handicapped high school students. Especially, there was significant growth of p<0.05 in architecture, office assistant, restaurant services, housework, and personal services. Also, there was significant growth of p<0.01 in vehic1e and laundry services. Second, application of transition program connected to community changed career interest preference of mentally handicapped high school students. The changed career interest preferences are vehicle, personal services, housework, office assistant, restaurant service, gardening, nursing, laundry service, goods management, architecture, and animal breeding Third, application of transition program connected to community raised career preparation of mentally handicapped high school students. Especially, there was significant growth of p<0.05 in general life and inappropriate behavior categoη. Also, there was significant growth of p<0.01 in socialization function and work function. Based on the study result, this study suggests the followings. First, transition program connected to community raises career interest of mentally handicapped students and it will raise their recognition and understanding on career before they get into the society. Second, transition program connected to community will make mentally han버capped students to improve their career preparation so that the students can have stable career life after graduation. Furthermore, they can improve their quality of life through the program. Third, transition program connected to community will raise consciousness of employer about handicapped people and it will have a big impact on hiring handicapped students afterward. Fourth, application of transition program connected to community will induce positive reaction from parents of the students which will make parents to take a role as a supporter in special school career education.