The purpose of this study was to examine the relationship between teacher rating and objective observation for preschool children's social skills. Ratings were made for social skills of 99 preschool children. Results showed that boys' social initiation skills and isolation behavior had a moderate, negative correlation, and girls' self-control skill and response readiness had a moderate, positive correlation. The correlation between teacher rating and objective observation was relatively low. The range and content of social skills that two rating methods measured appeared to be different.