An endoscope apparatus includes an imager configured to detect reflected and scattered light of illumination light radiated to an observation object and output an imaging signal, the illumination light including light in three wavelength ranges corresponding to first, second, and third depth regions, and an image processor including an intermediate emphasis image generator configured to generate an intermediate emphasis image, based on a first emphasis image signal generated based on emphasis narrowband light, a first non-emphasis image signal generated based on non-emphasis narrowband, and image signals corresponding to all wavelength ranges not including the first emphasis and non-emphasis image signals, and a display image generator configured to generate a display image based on the intermediate emphasis image.