本研究的目的在探討肥胖國中生的體重控制自覺自我效力及其相關影響因素。以結構式問卷，對高雄市某所國中的351位肥胖學生進行研究。研究結果發現:(1)肥胖國中生的飲食控制自覺自我效力的平均得分為64.66 ± 15.57分;運動行為自覺自我效力的平均得分為27.91 ± 9.60分。(2)男生在運動行為自覺自我效力的平均得分上顯著高於女生。(3)家庭社經地位不同，其在飲食控制自覺自我效力上會有差異。(4)自覺肥胖程度不同，其在運動行為自覺自我效力上有差異。(5)肥胖知識和飲食控制自覺自我效力有相關。此研究結果可提供未來在校園推廣體重控制計畫時的參考。

　　　　　The purposes of this research were to study perceived self - efficacy for weight control and related factors among obese junior high school students. A structured questionnaire was administered to 351 obese students of a junior high school in Kaohsiung City. The results of this research indicated that (1) The average scores were 64.66±15.57 on perceived self-efficacy for diet control and 27.91±9.6 on perceived self-efficacy for exercise behaviors. (2) The boys average score was higher than girls' on perceived self-efficacy for exercise behaviors. (3) Significant differences on perceived self-efficacy for diet control were found among the students with different social economic status. (4) There were discrepancies in perceived self-efficacy for exercise behaviors for students with different degrees of perceived obesity. (5) There were correlations between knowledge of obesity and perceived self- efficacy for diet control. The results of this research could be used as a reference in the future for extending plans of weight control used in junior high schools.