Background: The present study was conducted with the aim of considering the effectiveness of Religious–Based Cognitive Behavioral Therapy on organizational commitment and organizational effectiveness of Lorestan province officers.

Materials and Methods: The research design was clinical trials with pretest-posttest and control group. In this study, 40 police officers in Lorestan province were selected by using random sampling method and were assigned in 2 experimental group (n=20) and control group (n=20). Then the Demographic Questionnaire and Tseng organizational commitment and effectiveness questionnaire were administrated on both groups as pretest. Then the experimental group received 12 sessions of Religious–Based cognitive-behavioral therapy and the control group did not receive any intervention. In the end, post-test was administrated on both groups and, descriptive statistics such as mean, standard deviation, frequency, frequency percentage and inferential indices such as analyzing multivariate analysis of covariance with SPSS-20 software were used.

Results: The results of the present study indicated that after administrated religious–based cognitive-behavioral therapy, there were significant differences between the control and experimental groups (p<0.001), as compared to control group, the mean of organizational commitment and effectiveness organizational of experimental group increased.

Conclusion: Considering the result of present study, it can be recommended that in order to promote the organizational commitment and effectiveness of police officers and other organizations' employees, training and treatment courses be designed and held periodically.