The Scientific Critical Thinking (SCT) model is a learning model developed to train critical thinking skills and student self-efficacy. This study aims to analyze the effect of the SCT model in improving critical thinking skills and the self-efficacy of Primary School Teacher Study Program students. This study used quasi-experimental research with the design of one group pre-test and post-test. The research subjects were one hundred and eight students of the Primary School Teacher Study Program from three classes of the Lambung Mangkurat University. Data was collected through tests of Critical Thinking Skills, questionnaires about student self-efficacy, and in-depth interviews. The collected data was analyzed using paired t-test / Wilcoxon test and n-gain. The results of the research on class D, class E, and class F indicate that the sig value is obtained. (2-tailed) critical thinking skills are 0.00 (p = <0.05) and n-gain is class D 0.77, class E 0.77 and class F 0.77 show that it is important in high criteria. In addition, sig is obtained. (2-tailed) student’s self-efficacy is 0.00 (p = <0.05) and n-gain is class D 0.77, class E 0.81 and class F 0.79; shows significant results in high criteria. It was concluded that the SCT model was effective. This study implies that the SCT model can be used as an alternative to training students’ critical thinking skills and self-efficacy.