An endoscope apparatus according to the subject matter includes: an illumination device configured to emit light to an object an imaging device configured to generate a color imaging signal a normal image generation device configured to generate a normal image from the color imaging signal a spectral image generation device configured to generate a spectral image corresponding to a preset optical narrow band from the imaging signal a display device configured to display a main screen region and a sub-screen region having a size less than a size of the main screen region a switching signal generation device configured to generate a switching signal and a display control device configured to control the display device so as to selectively switch between a region for displaying the normal image and a region for displaying the spectral image based on the switching signal.
