In a population of 60 patients suffering from obsessive-compulsive disorders, the authors find 5 patients (8.3% of the whole group), all female (13.1% of the whole female subgroup) with an anorexia nervosa among their antecedents, which represents a relatively important rate compared to the rarity of anorexia nervosa in the general population. Clinical particularities of the subgroup are then studied. Results from this work are partially comparable with those found in the single similar study in the literature.