The main purposes of this research were to investigate the gifted behaviors of gifted students in elementary schools and to examine the gender differences. The Observation Scale for Gifted Behavior for primary school students, indicating good reliability and validity, was adopted as the research tool. Subjects were 709 elementary school students in Kaohsiung city. The results of this research were stated as follows: 1. The gifted students had positive performances in the Observation Scale. 2. The gifted girls had significantly better performances than gifted boys in "language expressiveness", "analytical thinking", "positive motivation", "sensitivity", "interpersonal communication", and "emotional expressiveness".