An omnidirectional camera comprises two or more camera units, a camera assembly in which the two or more camera units are mounted, a heat shield cover to accommodate the camera assembly, a heat insulating member interposed between the camera assembly and the heat shield cover, a space formed between the camera assembly and the heat shield cover, a required number of slits formed in the heat shield cover and extending in up-and-down direction, and in the omnidirectional camera, the space communicates with an outside through the slit.