A 54-year-old male visited our cancer center with the chief complaint of penile tumor in May, 1992. Magnetic resonance imaging (MRI) demonstrated a penile tumor and showed that this tumor invaded the submucosa but neither corpora cavernosa nor corpus spongiosum. Partial penectomy was performed in June, 1992. Histopathological examination of the resected tumor showed verrucous carcinoma. MRI was useful to investigate the degree of invasion of the penile tumor.