When displaying a peripheral image in the case where a traveling speed of a vehicle is lower than a predetermined threshold value, it is possible to provide a user with a state of a necessary area of the vehicle without switching a display mode. In an image display system, when the traveling speed of the vehicle drops to below a predetermined threshold value such that an operation mode shifts into a front mode, the display mode becomes a front/side mode that simultaneously displays both a front area and a side area of the vehicle at the time that the front mode is started. A screen presented in the front/side mode can respond to various circumstances such as approaching an intersection, passing by another vehicle, and moving a vehicle toward a roadside. Accordingly, a user can monitor a state of a necessary area around the vehicle, without switching the display mode.