Anti-theft system and anti-theft apparatus

A theft proofing apparatus for hindering theft when an intruder is detected in an alarm mode with no attendant. In a smoke generation system formed by coupling this theft proofing apparatus with an alarm system including an abnormality detector (20) for detecting an intruder into an alarm area and a mode setter (10) for setting or releasing an alarm state of the alarm area, and including a smoke generator (60) for generating smoke inside the alarm area, the smoke generator (60) is activated in response to the detection signal of the abnormality detector (20) when the alarm area is set to a unmanned state and alarm state by the mode setter (10), fills the alarm area with the smoke and restricts sight around the intruder. In this way, theft and destruction by the intruder can be prevented. When the alarm area is set to attendance mode inclusive of the release state by the mode setter (10), smoke generation activation control means of the system prevents the smoke generator (60) from being activated by the detection signals of the abnormality detector (20).