Anaphylaxis reaction to sesame paste could be a possible complication of vegetarian diet. This paper presents a case of a 6-year-old child who developed anaphylactic reaction after eating bread and sesame paste (obtained by grinding sesame seeds). The child suffered atopic dermatitis and had no incidence of anaphylaxis before. Because the sesame, as seeds, oil or paste is mostly used in bakery and in different foods, by non diagnosing this allergy in children with atopic dermatites could be life-threatening.