This study was to obtain the condition of managerial competence and competence supervision owned by the principals and the condition of the school's academic achievement as well as to determine the effect of managerial competence and the competence of the academic supervision of the principalto academic achievement. This study used quantitative research methods and did at a public elementary school, with a population of 100 teachers from 20 schools. The data collection is done by using a Likert scale questionnaire and documentary covered and analyzed used SPSS version 18. Before the questionnaire used, did test the validity and reliability. Test the validity of the questionnaire used bivariate correlation.Further,reliabilitytesting used Cronbach alpha coefficients for variables managerial competence is 0.889 And variable competence of supervision 0.795. Research finding shows an average of competence managerial is 4.16; competence of the academic supervision 4.34 and academic achievement 6.91