1. An image intensifier camera comprising: a fluoroscopic image imaging optical system including a front lens group, an aperture stop, and a rear lens group; an image pickup device; and a signal processing circuit, wherein the fluoroscopic image imaging optical system further includes an image inverse prism which is rotatably installed between the front lens group and the rear lens group, reflects incident light beams incident thereto a plurality of times, and outputs a mirror image by rotating an original image and inversing the left and right sides of the original image or the rotated original image.