Abstract
This study aims to determine the influence of contextual physics teaching materials in an effort to improve the mastery of student concepts. This research is a type of research development (reseach and development). The population is all students of class XI IPA SMA Negeri 2 Mataram 2016/2017 school year amounted to 365 students. The sample was determined by purposive sampling technique so that it was obtained by class XI IPA 2 (38 students) as experimental class and class XI IPA 3 (40 students) as control class. The instrument used to measure conceptual mastery is a multiple-choice test. The results showed that the use of contextual teaching materials influential in improving the mastery of the concept of students.