An object of the present invention is to allow prevention of a contact between a burr formed on an optical dome which is a part of a capsule-like casing and a living body in a subject. A capsule-type medical apparatus according to the present invention has a capsule-like casing 2 which can be introduced inside the subject. The casing 2 is configured with optically transparent optical domes 2b, 2c and a cylindrical trunk member 2a having an outer diameter dimension R2 larger than an outer diameter dimension R1 of the optical domes 2b, 2c. The cylindrical trunk member 2a is fitted onto an outer circumferential surface of the optical domes 2b, 2c so as to cover each of the optical domes 2b, 2c up to a portion near the burr formed thereon. The cylindrical trunk member 2a has a step M higher than the burr of the optical domes 2b, 2c so as to prevent a contact between the burr and a living body in the subject.
