This study aims to improve students’ achievement and learning activities in Islamic education by Enquiry. Classroom Action Research (CAR) is implemented for 2 months with two cycles, in July and August 2016. Data collection tool used is a test and observation. Test is used to measure learning achievement and observation is used to measure students’ learning activities during the implementation cycle I and II. Data analysis is done by qualitative descriptive. The results shows achievement is increased for student learning activities on the subjects of Islamic education on Munakahat materials using the inquiry method. The average percentages before the action is held on 35.25%, after the application of the method of Enquiry, the average percentages of in the first cycle is 61.76%, and after the second cycle is 91, 17%. The average activity of students in the learning process of Islamic education in the first cycle is 62.79% and the second cycle is 86.39%. Based on the results, this study suggests using the inquiry method to increase students’ achievement and learning activities, especially since the Munakahat material directly is related to the various problems facing mankind.