Background & Objectives: In the present study role of assertiveness training on self-esteem and loneliness was examined in female students with addicted parents.

Material & Methods: The method of this study was experimental and design of study was pretest-post-test with control group. The population of this study consisted of female students with addicted parents who were studying in Bojnurd middle schools between 2012-2013. Sixty cases were selected by convenience sampling and randomly divided into control and experimental groups. Self-esteem and loneliness of subjects in both pre-test and post-test were evaluated. Assertiveness skills were applied as the independent variable on the experimental group (8 sessions of 90 minutes).

Results: The results showed that there were significant differences between the experimental group and the control group. This means that assertiveness skill training caused significant changes in mean scores for self-esteem and loneliness of the experimental group compared to the control group.

Conclusion: Assertiveness skills can be a useful intervention for addicted parent’s students with self-esteem and loneliness problems.