Cluster analysis was used to identify subtypes among 98 peer-rejected 5–7-year-old boys. Repeated sociometric nominations obtained over a 1-year interval permitted examination of the relation between rejection subtype and sociometric stability. Results revealed that 48% of these rejected boys were aggressive, impulsive, disruptive, and noncooperative as well as not involved in mutual liking. A smaller number (13%) were socially shy, perceived themselves to be negatively regarded by their peers, and were uninvolved in mutual liking. Two other subtypes, accounting for 39% of these boys, did not seem especially deviant. These behavioral characteristics generally typified the four rejection subtypes 1 year later. 66% of the nonaggressive subtypes changed sociometric classification (i.e., became average or popular) after a year, whereas only 42% of the aggressive-rejected children did so, suggesting that peer rejection that involves aggression is more stable than rejection that does not.