The present invention provides a human body monitoring system capable of monitoring a human body by checking various parameters and also reporting health impairment such as sudden illness and emergency such as a crime to a prespecified contact address. A monitoring device carried by an object person for monitoring and having a transmitting section and a mobile terminal carried by the object person for monitoring and having a receiving section are connected in a wireless system using weak electric wave. An abnormal signal and positional information are set to the prespecified contact address or a management center based on the abnormal data signal received by the mobile terminal from the monitoring device. The monitoring device includes a non-contact type biomagnetic field measuring sensor for measuring a trend of action potential in the object person and transmits the abnormal data signal to the mobile terminal. The coverage distance of the weak electric wave is within 10 meters.