To test the hypothesis that the irrational, evaluative beliefs, postulated by Rational-Emotive Behavior Therapy, are associated with body dissatisfaction, 94 women (21 diagnosed with an eating disorder, 38 with high body dissatisfaction but without an eating disorder, and 35 with low body dissatisfaction) completed the Survey of Personal Beliefs and the Eating Disorders Inventory. Analysis showed no significant difference in body dissatisfaction between the Eating Disordered and High Body Dissatisfaction subgroups. No significant correlations between body dissatisfaction and irrational beliefs were found for the Eating Disordered subgroup. For the High Body Dissatisfaction subgroup, significant but low correlations were found between scores on body dissatisfaction and irrational standards for self and others and with negative self-rating. In terms of irrational beliefs the Eating Disordered and High Body Dissatisfaction subgroups showed a significantly greater tendency towards Catastrophizing, Low Frustration Tolerance, and Negative self-rating, compared to the controls, without any significant difference between the former two groups. The Eating Disordered subgroup but not the High Body Dissatisfaction subgroup differed significantly from the controls in terms of more Self-directed demands.