The purpose of this research was to increase students' achievement in reading comprehension by implementing the Directed Reading Thinking Activity (DRTA) strategy to the 7th grade students at SMP Negeri 1 Surabaya in the academic year 2020/2021. Each cycle of classroom action research consisted of three meetings and included four steps: planning, action, observation, and reflection. The data were gathered through the use of two instruments: observation and test. The results indicated that students made great progress in their ability regarding to the reading comprehension. Pre-test mean score was only 67.28, but improved to 72.42 in cycle I and 81.22 in cycle II. The pre-test of the highest score was only 78 and improved to 82 to 90 in subsequent cycles. Meanwhile, the lowest pre-test score was 60, and the lowest post-test score ranged from 62 to 68. In case of the students who passed the tests, while only 6 students (16.67%) passed the pre-test, there were significant improvements in post-tests, with 12 students (33.33%) passing in post-test cycle I and 29 students (80.56%) passing in post-test cycle II. This research was stopped in cycle II due to the fact that the criteria for success were met in a percentage of 80.56%, with 29 students passing the post-test in cycle II, based on the Minimum Mastery Criteria (KKM) standard of > 76.