PROBLEM TO BE SOLVED: To provide a stereoscopic endoscope apparatus capable of switching between stereoscopic observation and planar observation by two optical paths.SOLUTION: Stereoscopic observation is possible when electronic images having binocular parallax of a left-and-right pair obtained from both of the two optical paths are displayed side by side on a display panel 16, and planar observation is possible when either of the electronic images is selected and only the selected electronic image is displayed side by side. Since switching between stereoscopic observation and planar observation can be made by selecting either or both of the two optical paths, the internal structure can be simplified and an insertion part 10 can be made thinner.COPYRIGHT: (C)2014,JPO&INPIT【課題】 2つの光路で立体的観察と平面的観察の切り替えが可能な立体内視鏡装置を提供する。【解決手段】2つの光路の両方から得られた左右一対の両眼視差を有する電子映像を表示パネル16の左右に並べて表示すれば立体的観察が可能となり、いずれか一方の電子映像だけを選択して、それを左右に並べて表示すれば平面的観察が可能となる。2つの光路の切り替えだけで、立体的観察と平面的観察が行えるため、内部構造が簡略で挿入部10の太さも細くできる。【選択図】 図2