This study examined the relationship between psychological needs satisfaction, motivational regulations in physical education and physical activity intention among elementary school students. A total of 291 elementary school students in grades 3-6 voluntarily completed the three measures. This study indicated that satisfaction of three basic psychological needs powerfully enhanced self-determined motivation, moderately contributed to introjected regulation and negatively impacted external regulation and amotivation among elementary school students. Having fun, gaining specific benefits and making social connections with their friends all positively influenced elementary school students' physical activity intentions outside of school.