The purposes of the present study were to investigate the relationship between identity development and family functioning in adolescence, and to compare it in freshmen and juniors. Rasmussen' s Ego Identity Scale for Japanese, and Family Adaptability and Cohesion Evaluation Scales III (FACESIII) for Japanese were administered to 241 freshmen and 150 juniors. The main results were the followings: (1)Cluster analysis was performed on the level of cohesion and adaptability, and both freshmen and junior were grouped into four categories. (2)Freshmen high on both cohesion and adaptability tend to be higher on both identity based on individuation and identity based on relatedness. (3)This relationship was not found in juniors. Each cluster of juniors were same on identity based on individuation and identity based on relatedness.