Objectives Avoidance is a maladaptive schema that leads to maladaptive coping responses, followed by psychological problems. In this regard, we need a tool that is able to measure Avoidance schema. Also, there is no Persian version for measuring avoidance schema, so we need a tool that be able to measure Young-Rygh Avoidance schema in Iran. Thus, the aim of the present research is to assess the validity, reliability and factor analysis of the Persian version of Avoidance Inventory. Methods The sample included 382 students of the University of Social Welfare and Rehabilitation Sciences University who were selected using convenience sampling method. To assess the convergentdivergent validity, the Avoidance Questionnaire, Acceptance and Action Questionnaire (AAQ-II), Beck Depression Inventory-Second Edition, Beck Anxiety Questionnaire, and the Young overcompensation inventory. Results Factor analysis extracted eight factors that explained 54.92 percent of total variance. Internal consistency using Cronbach's alpha is acceptable (0.69-0.83), and time reliability is appropriate (0.72-0.92). Relationship of Avoidance Inventory with anxiety inventory (0.29), depression inventory (-0.21), excessive compensation (0.43) and acceptance and action scale (0.30) shows the convergent-divergent validity. Conclusion The Persian version of Avoidance Inventory is a reliable and valid tool.