The aim of this research was to find out the effectiveness of using story mapping technique on students’ reading comprehension at the tenth grade students of SMA Negeri 1 Sokaraja in academic year 2018/2019. This research was conducted from 25th march up to 9th April 2019. This research used quasi-experimental design. The subject of this research were X MIPA 3 as experimental class which consisted of 31 students and X MIPA 1 as control class which consisted of 31 students. The technique of collecting data used pre-test and post-test. The type of the test was multiple choices consisted of 20 items to measure the understanding of students on narrative text. The data were analyzed by using t-test formula. Based on the computation, t-test result was 2.320 and t-table for the degree of freedom (df) 60 at the level of significant 0.05 was 1.671. It showed that t-test result was higher than t-table (2.320> 1.671). Based on the research result, the hypothesis saying that story mapping technique on students’ reading comprehension was accepted.