The purpose of this study was to describe the critical thinking ability of students of SMP Negeri 1 Purwokerto. Viewed from self-regulated learning in even semester of the 2019/2020 academic year. This research was a qualitative descriptive study. Students were classified into low, moderate, and high self-regulated learning categories based on the self-regulated learning questionnaire data. The data on the results of critical thinking Skills tests and interviews were used to describe students' critical thinking skills. The results of this study showed that high self-regulated learning students were able to master the indicators of analyzing and synthesizing while students with the moderate self-regulated learning category only mastered the analyzing indicators. In contrast, students with low self-regulated learning category had not mastered the critical thinking ability indicators