Provided is a stereoscopic endoscope device (10) enabling precise observation based on a 3D-image and observation of a wide field of view range based on a 2D-image and enabling the change of the field of view range according to the situation with a simple structure without increasing the size of an imaging unit or complicating the configuration. An imaging unit (50) disposed in a distal portion (30) of a stereoscopic endoscope (12) includes a pair of left and right imaging units (50L, 50R) that capture a parallax image of a subject of a part of interest. The left and the right imaging unit (50L, 50R) include a left and a right imaging optical system (60L, 60R), which form a subject image, and reflecting mirrors (302L, 302R) located on the rear end sides of the left and the right imaging optical system (60L, 60R), respectively.
