The endoscope system (1) has: an insertion part (4), which is inserted into the interior of the subject; and a direct-view observation window (11a), which is provided in the insertion part (4), from A first subject image is obtained from a first area of ??the subject; a side view observation window (11b), which is provided in the insertion part (4), obtains a second subject image from a second area of ??the subject that is at least partially different from the first area. two subject images; and a video processor (32) that when generating a first image signal based on the first subject image and generating a second image signal based on the second subject image, in conjunction with the first image signal In the arrangement relationship, image processing is performed so that the width of the image area expands as the distance from the area adjacent to the first image signal increases, and an image signal is generated.