The purpose of this study was to investigate the relationship between perfectionism and student achievement. Samples were 412 elementary school students in Taipei City and New Taipei City, including third-grade and fifth-grade students in dance-talented and regular classes. Research tools were Perfectionism Scale and achievements tests. The Perfectionism Scale included four subscales like high personal standards, concerns about mistakes, parental expectations, and parental criticism. Student achievements were academic achievements in mandarin and mathematics, and performing achievements in ethnic dance, ballet, modern dance, and improvisation. Statistical analysis included descriptive statistics, t-test, two-way analysis of variance, and Pearson product-moment correlation. The main findings of this research were stated as follows: 1. There were no significant differences between gifted students with dance talents and regular students in the Perfectionism Scale. 2. There were significant differences between students of different grades in the Perfectionism Scale. 3. There were significant positive correlation s between high personal standards and performing achievements in dance like ethnic dance, ballet, and modern dance. 4. There were significant negative correlations between concerns about mistakes and academic achievement in mathematics. 5. There were significant negative correlations between parental criticism and academic achievements in mandarin and math, and between parental criticism and ballet achievement.