To provide a fire hazard preventing comprehensive safety device not just issuing an alarm in a fire hazard but also helping evacuation and providing early detection and early evacuation.

The fire hazard preventing comprehensive safety device 10 is provided on its body with a hooking ceiling fitting 9 corresponding to a ceiling hooking ceiling device 14 and it is attached to a ceiling without requiring a tool or the like. It can be supplied with electric power, it has a smoke sensor and a Co sensor in a body interior, and it is also provided with a battery for backup. It issues the alarm by sound in a hazard, and it indicates an emergency exit by irradiating a laser point 12 on a set exit which will be the emergency exit in a hazard by a laser gun 8 of a body exterior.