Despite the growing attention devoted to the topic of sexual harassment among lay people, little psychological study has emerged due to the lack of a commonly accepted definition and a reliable and valid instrumentation that could provide comparable results across studies. The present study was intend to identify the dimension of sexual harassment, surveying 485 men and 165 women working in major companies in Seoul, Korea. It was found that sexual harassment is divided into three categories; verbal harassment, relation-request harassment, and physical/environmental harassment.