An endoscope device (100) includes an imaging element (23) that images a subject through an imaging optical system including an objective lens (21) disposed at a distal end part (10C) of the endoscope (1), a signal processing unit (42) that processes a captured image signal, which is obtained by imaging the subject by the imaging element (23), to generate a captured image, an auxiliary measurement light emitting unit (30) that emits planar auxiliary measurement light (30A) into a visual field (21A) of the imaging optical system from the distal end part (10C), and a display control unit (43) that causes a display unit (7) to display the captured image including an intersection line (30f) formed in a portion where a plane (30F) formed by the auxiliary measurement light (30A) intersects the subject. The display control unit (43) causes a scale (70A) serving as an index of the size of the subject to be displayed on the intersection line (30f) included in the captured image.
