Two investigations were carried out to understand the relationship between self-enhancement bias and psychological adjustment. In study 1, a scale for measuring the self-enhancement bias was constructed and the relationship between self-enhancement bias and psychological adjustment was examined in Korean college students. The relationship between two variables was significant in Korean college students. At study 2, college students and laborers in Korea and Germany participated to examine the relationship between two variables. It was significant both samples. This is very interesting result because it is reverse the existing outcomes that there are no self-enhancement bias and no relationship between self-enhancement and psychological adjustment in collective cultures. It is need to develop more refined measure tool and to do comparison with various cultures for more profound research on self-enhancement bias and cultural difference.