This study was an attempt to examine the relationships among gender, self-esteem and sport participation constraints of urban elementary school students. Two hundred and six 6th grade elementary school students were selected for this study. Three types constraint model was applied for conceptualization and measurement of sport participation constraints. A self-administration questionnaire was employed for collecting data. According to data analysis, the findings of this study are as following. The construct validity and reliability of self-esteem and sport participation constraints measurement are satisfactory. Among three types of constraints, structural constraints were perceived as higher than intrapersonal and interpersonal constraints. Female students perceived significantly higher intrapersonal constraints than male students did. It was found that self-esteem was negatively related to the perceived sport participation constraints. Discussions and implications were made following these findings.