Objectives: Extreme concern about body shape is the main feature of eating disorders. Eating disorders co-occur with several medical and mental disorders. So the use of a valid and reliable tool for measuring and preventing this disorder and its consequence seems necessary (or very helpful). Therefore, the aim of the present study was to examine psychometric properties of the Body Shape Questionnaire 8C (BSQ- 8C) in a sample of women with eating disorders.Methods: The main tool of this cross-validation study, i.e. BSQ-8C, was translated to Persian. Then psychometric properties of the scale were studied in a sample of women with eating disorders who were selected by convenient sampling method. Data collecting tools were BSQ-8C, BSQ-34, Body Dysmorphic Meta Cognition Questionnaire (BDMCQ), and Yale-Brown Obsessive Compulsive Scale for Body Dysmorphic Disorder (YBOCS–BDD). For data analysis with SPSS version 16, correlation coefficient, Cronbach’s alpha, split half coefficient, and ROC curve were used.Results: In the sample of women with eating disorders the coefficients of Cronbach's alpha and split-half were 0.79 and 0.74, respectively. Concurrent validity by way of correlation between the scale and BSQ- 34, YBOCS–BDD, and BDMCQ were 0.91, 0.59 and 0.58, respectively. Sensitivity, specificity, and the cut point of this questionnaire were 0.80, 0.67 and 26.5, respectively.