To provide a stereoscopic endoscope apparatus capable of reducing the visual interference caused when a treatment instrument approaches an imaging unit. Provided is a stereoscopic endoscope apparatus that includes a plurality of imaging units and a channel having an operable treatment instrument inserted therethrough and stereoscopically displays an image obtained from the plurality of imaging units, the stereoscopic endoscope including: a front end detecting unit that detects a front end of the treatment instrument within the image acquired by the imaging units an area determining unit that determines an area to be displayed as a two-dimensional image and a two-dimensional image processing unit that two-dimensionally images the area to be displayed as a two-dimensional image, in which the area to be displayed as a two-dimensional image is an area where the treatment instrument is seen.
