Achievement is the end-product of all educational endeavours. This study investigated the difference in academic achievement of JKBOSE and CBSE senior secondary school students. The population of the study consisted of all JKBOSE and CBSE senior secondary school students of Bandipora district of Jammu and Kashmir. Sample of the study comprised of 192 senior secondary school students of Bandipora district of Jammu and Kashmir selected through stratified random sampling technique. The previous year’s annual examination marks of 12th grade students were used to measure their academic achievement. Findings of the study revealed a significant difference between JKBOSE and CBSE senior secondary school students. The students belonging to CBSE schools were found to have higher academic achievement than JKBOSE senior secondary school students. Further, male students of CBSE schools were found to have better academic achievement as compared to the male students of JKBOSE senior secondary schools. However, no significant difference was found between female students of JKBOSE and CBSE senior secondary school students.