There is provided an endoscope apparatus where the obstruction of the visibility of an object to be measured caused by auxiliary measurement light does not occur even though the auxiliary measurement light is used to measure the size and the like of the object to be measured.Illumination light is continuously emitted and auxiliary measurement light is emitted in the form of a pulse at a specific frame interval. A subject illuminated with illumination light is imaged to obtain a first taken image. A subject illuminated with illumination light and auxiliary measurement light is imaged to obtain a second taken image. A specific image where a measurement marker obtained from the second taken image is displayed in the first taken image is displayed on a display unit.
