An endoscope apparatus includes: a display image selecting portion that selectively outputs one of a surgical image and a gastrointestinal image inputted via an input portion or outputs both of the surgical image and the gastrointestinal image a combining portion that generates, when both of the surgical image and the gastrointestinal image are outputted by the display image selecting portion, a composite image for performing two-screen display of the surgical image and the gastrointestinal image and a processor that performs image judgment processing, the processor detecting whether a high-luminance area formed by illumination light radiated at a time of image pickup by the gastrointestinal endoscope exists in the surgical image and deciding, when detecting that the high-luminance area exists in the surgical image when the surgical image is displayed in one screen, a display method for causing two-screen display based on the composite image to be displayed.
