We report two patients with multiple peculiar skin eruptions and polyclonal hypergammaglobulinemia. Both patients visited our hospital for the evaluation of asymptomatic multiple nodular eruptions on almost their entire body except for the lower extremities. Histologic examinations disclosed prominent infiltration of plasma cells and lymphoid follicular hyperplasia in the dermis but these plasma cells showed neither a mitotic figure nor atypicalities. Laboratory examinations showed polyclonal hypergammaglobulinemias and increased erythrocyte sedimentation rates. In spite of various investigations, the cause of the hypergammaglobulinemia remained obscure.