An image surveillance apparatus includes: an imaging section including a convex mirror having a shape of a body of rotation, the imaging section obtaining an image of an omniazimuthal region and generating image data of the omniazimuthal region; a surveillance region setting section for setting a surveillance region in the image data of the omniazimuthal region which is obtained from the imaging section; an image processing section for performing image processing according to determination information obtained from a comparison/determination between background image data obtained by the imaging section in advance, which is used as a reference that represents a normal state of the surveillance region, and current image data obtained by the imaging section at a predetermined time interval; and a surveillance information output section for outputting surveillance information according to the determination information.