This study aims to determine the effect of work climate on teacher performance at MTs Swasta Cerdas Murni. The work climate here includes physical, social, and psychological conditions in the teacher's work environment, which includes aspects such as managerial support, communication between colleagues, and the level of perceived security. This research method is quantitative using a questionnaire as a data collection tool and other supporting data. The population in this study were all teachers at MTs Swasta Cerdas Murni, so that the entire population in this study was a sample of 30 teachers (population study). Based on the results of the study and the hypothesis, it shows that there is a significant influence between work climate on teacher performance at MTs Swasta Cerdas Murni. Based on the results of the study and calculations, it was found that there was an influence between work climate variables on teacher performance at MTs Swasta Cerdas Murni. The results of the hypothesis test with the T test showed that t count = 2.976, df = n-2 = 30-2 = 28. The t table value = 2.048, at the 0.05 level. Because t count ≥ t table, namely = 2.976 ≥ 2.048, with a significance value of 0.006 (6%) it can be concluded that Ho is rejected and Ha is accepted. This is supported by the results of a simple regression test which states the relationship between the two variables, Y = 30.705 + 1.456X. The meaning of this regression equation is if the work climate value is 0, then the teacher's performance value is 30.705. The regression coefficient value of the teacher performance variable (b) is 1.456; this can be interpreted that for every 1% increase in work climate, teacher performance increases by 1.456. Furthermore, in the determination coefficient test, the R square value is obtained = 0.240, this means that the work climate variable affects the teacher performance variable by 24%. Thus, teacher performance at MTs Swasta Cerdas Murni is 24% influenced by the existing work climate and 76% is influenced by other factors or causes other than the variables studied. Nevertheless, it can be suggested for teachers and school principals to continuously improve their performance in order to achieve the school's goals effectively and efficiently.
                        
                        
                        
                        
                            
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