本研究旨在探討嘉義縣國、高中職田徑選手教練領導行為、團隊凝聚力、社會支持與運動自信心的關係與影響，並驗證團隊凝聚力對教練領導行為與運動自信心的中介效果，以及社會支持對教練領導行為與運動自信心的干擾效果。因此，以嘉義縣國、高中職田徑選手為研究對象進行問卷調查，共發放350份問卷，回收有效問卷326份，有效問卷回收率93.1%。研究結果顯示：(1)教練領導行為對運動自信心有顯著的正向影響；(2)教練領導行為對團隊凝聚力有顯著的正向影響；(3)團隊凝聚力對運動自信心有顯著的正向影響；(4)社會支持對運動自信心有顯著的正向影響；(5)團隊凝聚力對教練領導行為與運動自信心之間具有中介效果；(6)社會支持對教練領導行為與運動自信心之間具有干擾效果。 The purpose of this study was to explore the relationship and influence of coaches' leadership behavior, team cohesion, social support and sport confidence, and to verify the mediating effect between coaches' leadership behavior and sport confidence caused by the team cohesion, as well as the interference effect between coaches' leadership behavior and sport confidence caused by the social support. The objects of this study was 350 track and field players in junior and senior high school in Chiayi County. The research used the questionnaire survey procedure. 350 questionnaires were distributed and 362 collected. The effective questionnaire recycling rate was 93.1%. The results were as follows：1. Coaches' leadership behavior has a significant positive effect on sport confidence.2. Coaches' leadership behavior has a significant positive effect on team cohesion.3. Team cohesion has a significant positive effect on sport confidence.4. Social support has a significant positive effect on sport confidence.5. Team cohesion causes mediating effect between coaches' leadership behavior and sport confidence.6. Social support causes interference effect between coaches' leadership behavior and sport confidence.
