A vehicle-peripheral image displaying system (a side view monitor system A1) comprises a side camera 1, a monitor 3 and an image processing controlling unit 2, wherein the image processing controlling unit 2 includes an image processor 43 configured to perform a viewpoint conversion of the actually shot camera image input from the side camera 1 into a virtual camera image which is to be converted as if it is viewed from the driver's eye position, an image memory 44 configured to store a vehicle interior image which is previously shot from the driver's eye position as a vehicle interior image, and a superimposing circuit 46 configured to make the vehicle interior image translucent to form a translucent vehicle interior image, to perform an image composition such that the translucent vehicle interior image is superimposed on the virtual camera image, and to produce a composite image which represents the virtual camera image transparently through the translucent vehicle interior image.