Patent ID: 8348835

Claim:
A capsule-type endoscope comprising: an illumination board which is prepared to mount an illuminating electronic component necessary to illuminate a test region of a test subject with illumination light; an image sensor which has a light-receiving surface including an effective area and an ineffective area, the illumination light reflected from the test region being received to generate an image of the test region in the effective area, the ineffective area not contributing to the image generation; an imaging board which is arranged in parallel with the illumination board, the image sensor being mounted on the imaging board; and a component arrangement unit in which the illuminating electronic component is arranged, the illuminating electronic component being provided in an area on the illumination board, the area on the illumination board being arranged close to the effective area and at a position corresponding to the ineffective area within a range where the illumination light from the illumination electronic component has no influence on the image of the effective area; wherein in the case where the imaging board and the illumination board are arranged in the capsule by folding the flexible board connecting the imaging board and the illumination board, a tall electronic component disposed on a front surface of the imaging board faces a small-profile electronic component disposed on a back surface of the illumination board and a small-profile electronic component disposed on the front surface of the imaging board faces a tall electronic component disposed on the back surface of the illumination board.