This study assessed the Principals‟ Supervisory Practice on Teachers‟ Role Performance in Junior Secondary Schools in Kaduna State. Six (6) objectives were raised to guide the study, which are to examine the impact of principals‟ classroom visitation on teachers‟ role performance in Junior Secondary Schools in Kaduna State; assess the impact of principals‟ supervisory practice of record checking on teachers‟ role performance in Junior Secondary Schools in Kaduna State among others. Six (6) research questions and six (6) research hypotheses were formulated to guide study and they are in line with the stated objectives. Descriptive survey research design was used for the study. The population of the study is six thousand, two hundred and nine (6,209) respondents which consists of five thousand, five hundred and eighty (5,580) teachers, four hundred (400) principals and two hundred and twenty nine (229) school inspectors in Kaduna State. 357 respondents were used as the sample size in the study. Simple random sampling technique was used to obtained the sample size for the study. The instrument used for the collection of data was questionnaire. Descriptive statistics of frequency counts and simple percentage were used to analyze the bio-data of the respondents and mean was used to answer the research questions. Inferential statistics of Analysis of Variance (ANOVA) was used to test the six (6) formulated null hypotheses at 0.05 level of significance. The findings of the study revealed that Principals‟ classroom visitation promotes attendance of teachers which enhances their role performance in Junior Secondary Schools in Kaduna State. The findings also revealed that principals‟ supervisory practice of record checking such as checking of teachers‟ lesson note, scheme of work and lesson attendance register enhance the teachers‟ role performance in Junior Secondary Schools in Kaduna State. The study recommended that school principal should promote the practice of classroom observation as instructional supervisory tool for the realization of their mandates of improving the performance of teachers. This can be done by taking notes of the classroom observation and recording exactly the activities of both the students and the teacher and make suggestions for further improvement