To provide an emergency monitoring system which can haste to rescue a person who works at a dangerous place such as firemen or rescue personnel when the person falls into a dangerous situation.

The system comprises a vibration sensor which can be attached to a body of rescue personnel or the like who go to a dangerous place, a transmitting device which sends the fact that a vibration signal is not outputted from the vibration sensor for a certain period of time by wireless, and a receiving device which receives the signal sent from the transmitting device and issues a warning. It is preferable that a switch for sending a specific signal according to an intention of the rescue personnel or the like who carry the transmitting device is provided to the transmitting device.