ABSTRACT The purpose of this study was to analyze the effect of the Trikaya Parisudha Learning Model (TPLM) on Critical Thinking Skills (CTS). This research was a quasi-experimental study using a pretest-posttest control group design. The study population was the 6th semester of elementary school student teachers of totalling six classes or 168 people. The study sample was two classes or 52 people, selected by random cluster sampling. CTS data were collected with a test instrument. It was analyzed using descriptive statistics and inferential statistics. Descriptive statistics are used to describe the average value and standard deviation, while inferential statistics are used to test hypotheses with a t-test at a significance level of 5%. The results of data analysis showed that the average pretest score was 65.23 in the experimental group and 64.27 in the control group. Meanwhile, the posttest means the score was 79.23 in the experimental group and 66.62 in the control group. The posttest t-test results obtained a value of t = 0.344 with sig. = 0,0001 <0.05. Meanwhile, the pretest obtained a value of t = 4,571 with sig. = 0.732> 0.05. These results indicate that the experimental group is better than the control group. Thus it can be concluded that there is a significant influence of TPLM on elementary school student teachers’ CTS. Therefore, lecturers are expected to be able to use this model to improve students' critical thinking skills.