Assembling method of capsule medical apparatus and capsule medical apparatus

A capsule medical apparatus comprising:

• an illuminating unit;
• an image pick-up unit which picks up an image of a portion illuminated by the illuminating unit;
• an objective optical system arranged along an optical path of the image pick-up unit;
• a sealed capsule which seals and incorporates the illuminating unit, the image pick-up unit, and the objective optical system;
• a fixing frame to which a first objective lens configuring an objective optical system is fixed, the fixing frame being fixed at a reference position of an image area of the image pick-up unit such that a reference position of the fixing frame matches the reference position of the image area;
• a guiding frame extended in an optical path direction on a surface of the fixing frame on an opposite side not facing the image pick-up unit;
• and
• a movable frame to which a second objective lens configuring an objective optical system is fixed, the movable frame being positioned and fixed in the optical path direction by being moved in the optical path direction relative to the guiding frame.