Some tumorous lesions involving the temporal bone present as a middle ear cavity mass. These show through the intact tympanic membrane, and also represent otological symptoms such as hard of hearing, tinnitus and facial palsy. Recently, the introduction of the otologic telescope has made possible obtaining the exact status of the tympanic membrane. By photographing the tympanic membrane, we analysed the occurrences of 16 cases of the tumorous lesions as following 4 skull base tumors, 2 glomus tumors, 2 high jugular bulbs, 4 congenital cholesteatomas, 4 cholesterol granulomas in the temporal bone according to four quadrants of the tympanic membrane. Radiographic materials (temporal bone computed tomogram and magnetic resonance image) were included for clarifying the ear drum findings. The purpose of this study was to familiarize the otolaryngologists with the myringoscopic finding of the tumorous lesion in the middle ear.