Objectives: Study of ossicular chain on computed tomography of the normal temporal bone and of otitis media with cholesteatoma. Subjects and methods: Descriptive and prospective study was performed on 32 CT of the normal temporal bone and 50 CT of the temporal bone in otitis media with cholesteatoma, aged more than 16 years old, at ENT Hospital HCM City, from October 2009 to June 2010.Results: CT of the normal temporal bone with images: "ice cream cone", "2 parallel lines", 2 white dots "," right angle "," a white dot "," a white spot ".