Multiple histiocytomas are rare and defined when more than 15 lesions are present according to Baraf and Shapiro. It has been reported occurring in patients with autoimmune disease, who were receiving immunosuppressive treatment. Reports in the literature of these multiple lesions occurring in a healthy person are very rare. A 45-year-old man had 26 asymptomatic nodules on the trunk and upper extremities of two years duration. The lesions varied from 5mm to 2cm in size, were brownish, round, firm, nontender and positive for dimple signs. Microscopic examination of the lesions were indistinguish able from those seen in dermatofibroma. Most cells react intensively with factor XIIIa. (Kor J Dermatol 1997;35(4): 819-823)