The endoscope apparatus effects shifting without disappearance of a side observation image until a boundary between the side observation image and a non-image-forming region reaches an end of a light receiving surface so that a displacement of a shift distance K is produced between an optical axis of an imaging optical system and a center position L of the light receiving surface of an imaging section, adjusts a magnification of the imaging optical system, and magnifies and displays a combined image of a front observation image and the side observation image.
