This study aims to see the improvement of students' process skills in MIN Yogyakarta 2 using laboratories. This research is a classroom action research (CAR) consisting of three cycles. The subjects of this study were 39 students in class IV. The data collection technique used was observation while the instrument used was a process skills observation sheet, a student's scientific attitude observation sheet, and a student's performance observation sheet. The collected data were analyzed with qualitative and quantitative techniques. The results showed that the use of laboratories can improve: (1) students' scientific process skills, (2) student performance, (3) scientific attitude. Improved process skills can be seen in the average score of science process skills in students in the first cycle is 13.96 in the low category. In the second cycle increased to 21.84 in the high category. In the third cycle it increased to 26.35 in the very high category. The average performance score of students in the first cycle was 5.167 (very low), the second cycle was 6.872 (moderate) and the third cycle was 9.336 (high). The average scientific attitude of students in the first cycle was 10.256 (low), the second cycle was 14.923 (high) and in the third cycle it increased to 18.128 (very high). Thus it can be concluded that there is an increase in students' process skills through the use of laboratories. Keywords: laboratory; improvement; process skills.