This research aims at examining the implementation of academic supervison by schools’ supervisors, supervision by the principals and teachers’ performances, the influence of the implementation of academic supervision by schools’ supervisors toward teachers’ performance, the influence of supervision by principal toward teachers’ performance and the influence of the implementation of academic supervision by supervisors and the supervision by the principals simultaneously toward teachers’ performance at SMKN in Majene district. Type ex post facto research, with 210 teachers of civil servants as a population in the sample of 138 teachers determined by proportional random sampling technique. The instruments used were questionnaires with teacher respondents. Instrument development begins content validation, grains and instruments. Analysis using descriptive analysis and infrensial analysis. The results of descriptive analysis indicate that the implementation of supervision of school supervisor supervision is not done well and categorized low, supervision of principal executed well and categorized high and performance of teacher executed well and categorized high. The results of inferential analysis using linear regression indicate that; (1) the implementation of academic supervision by schools’ supervisors give significant influence toward teachers’ performances, (2) supervision by the principals significant influence toward teachers’ performances, (3) the implementation of academic supervision by schools’ supervisors and supervision by the principals collectively give significant influence toward teachers’ performance.