This study aimed at examining the relationship between identity status and interpersonal relations in late adolescence; it also considered the various types of identity formation psycho-dynamically from a viewpoint of separation-individuation process. The identity status in this study was based upon Marcia's popular concepts, and additioned to Kato's intermediate concepts. The interpersonal relatedness covered both the “approach” and “avoidance” dimensions of relatedness; that is,“dependent relatedness”,“intimate relatedness” and “negativity to relatedness”, in conscious relatedness materials by a self-report as well as in projective ones by Thematic Apperception Test. The study was administered to 157 male university students. As a result, each status had a distinctive interpersonal style; especially two intermediate status showed characteristic identity formations. Diffusion-Moratorium intermediate was distinguished by avoidance or unvoluntary commitment to closely interpersonal relationship as well as to a task of individuation. Achievement-Foreclosure intermediate was characteritic in its identity style depending on its belonging to concerned relationship or groups. The identity styles of the above mentioned types were suggested to prove closely relations to Japanese culture and interpersonal styles.