Purpose: The purpose of the present research is to review the effectiveness of philosophy education program for children on critical thinking and its components in elementary fourth-grader girl students. Material and method: This was a semi-experimental study with designing pretest and posttest and the control group with following-up phase. Findings: This statistical population consists of elementary fourth-grader girl students in Arak, district 2. The sample of this research consists of 50 students that were selected by convenience sampling method and divided to two control and test groups. Shabani (1999) critical thinking questionnaire was used for data collection. Discussion: The results of covariance analysis showed that execution of the philosophy education program for children improves critical thinking, recognition ability, analogizing, and judgments in children (P<0.05). Furthermore, the effectiveness of philosophy education program for children was durable in fallowing-up test.
