This study investigates how naturally occurring parent groups form by using Schaefer’s two axes of affection–rejection and autonomy–control, it also aims to verify whether there is a significant difference in the parent groups' emotional expressiveness and children's peer competence. A total of 201 kindergarten children between the age of 3 to 5 and their parents were given a questionnaire in order to investigate parenting attitudes and emotional expression. And children's teachers measured their peer competence. SPSS 18.0 was used and clustering analysis was conducted according to different parenting attitudes. The first fathers’ group was named the lacking-affection group, the second was the democratic-reception group, the third was the ignorance group and the last was the rejection group. For mothers' groups, the first was named the rejection group, the second was the autonomous-control group and the third was the reception-respect group. Parents' emotional expressiveness of each group had a considerable difference while there was no significant difference between children's peer competence. This study was dedicated in deriving meaningful implications on the role of parents by investing the differences between each naturally occurring cluster.