An outside-vehicle environment monitoring apparatus includes: imaging devices including center, right, and left imaging devices; a controller; and display devices including center, right, and left display devices. The imaging devices respectively capture images of environments present in a center rear direction, a right rear direction, and a left rear direction from the vehicle. The controller acquires captured images and output display images based on the captured images. The display devices are arranged side by side within a visual range of an occupant. The center display device is disposed between the right and left display devices at a visible distance from the occupant different from the visible distance to the right display device and the visible distance to the left display device. The center display image displayed between the right and left display devices is visually perceived as having a depth relative to the right and left display devices.