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Self efficacy (SE) and mathematical critical thinking skills (MCTS) have been studied extensively. But study about the correlation of booth based on students cognitive stages (SCS) is rarely done. This study involved 25 students from seventh grade determined by purposive sampling technique in one of the schools in Cimahi. The instrument used the Longeot test, Test of Logical Thinking (TOLT), an Essay MCTS, and a scale of SE. Data analysis performed: percentage calculation, testing of mean difference, and correlations testing at a significance level of 5%. Based on the results and discussion it was concluded that, in general, the SCS classification of seventh grade students based on the Longeot Test and TOLT scores was obtained 24% of students were in the concrete stage, 68% of students were in the transition stage, and 8% of students were in the formal stage. This means that most seventh grade students are in the transition stage. There are differences in MCTS based on SCS. There is no difference in SE based on SCS. The relations of SE and MCTS based on SCS is not significant.