The purpose of this study is to test the effectiveness of the peer counseling model for improving students' self-direction competence. The research aimed to describe, test and analyze the effectiveness of the peer counseling model and employed the descriptive-analytical method and quasi-experiments to do this. The research activities consisted of a series of model validity tests, namely the model rationality test, the model practicability test, and the limited test. The data collection techniques were interviews, self-direction competence inventories, observation and documentation. The result of the research demonstrate that the peer counseling model as an intervention program for the experimental group as a whole proved to effectively improve students' self-direction competence. The peer counseling model has its strengths in self-confidence, self-reliance, and self-control.