We report a case of bowenoid papulosis of the vulva in a 37-year-old woman. Bowenoid papulosis represents a new phenomenon which shows clinical characteristics quite different from classical Bowen's disease and histologic features of squamous cell carcinoma in situ. The patient had several brown-black flat papular lesions on the both sides of the vulva. The lesions were 2 to 9 mm in diameter, somewhat verrucoid and sharply demarcated. On history, these lesions developed from previous several grouped vesicular eruptions which were suspected to the lesions of herpes simplex. Although clinically the lesions appeared benigh, histologic examination showed. changes of squamous cell carcinoma in situ. The lesions were removed with electrodesiccation & curettage and are under observation. It is considered that bowenoid papuIosis should be ruled out by histologic examination in cases of unusual papular lesions of the genitalia in young people and that additional case studies with long-term folIow-up will be needed.