1. A blind-spot image display system for vehicle including a camera configured to capture surroundings of a vehicle that is a blind spot from a driver; a monitor set at a location in a vehicle cabin; and an image processing controller configured to generate a monitor image signal for the monitor by image processing based on a real camera image signal inputted from the camera, wherein the image processing controller comprises: a blind-spot image formation unit configured to perform point-of-view conversion on the real camera image signal inputted from the camera into a blind-spot image that is viewed from the position of the driver's point of view; a vehicle cabin image formation unit configured to form a vehicle cabin image that is viewed from the position of the driver's point of view; a see-through display image generation unit configured to render the vehicle cabin image to be superimposed on the blind-spot image into a semi-transparent vehicle cabin image; and an animation display image generation unit configured to generate an animation display image in which the vehicle cabin image to be superimposed on the blind-spot image is shifted stepwise from a non-transparent image to a see-through image.