The purpose of this study to investigate the relationship between Body Mass Index (BMI) and Depression on students. This is a correlation. community was 12674 students of second level of high school of the Arak , participated 130 students study. Data were collected using, DASS-21 scale, BMI was calculated by weight(kg) / height (m. m). SPSS 25 Software and Pearson correlation was used for data analysis. Data revealed a positive correlation between Body Mass Index and depression(R = 0.111, P = 0.211). As a result, was correlate between BMI with height Depression.