PROBLEM TO BE SOLVED: To inform people around a person at risk of heat stroke of the existence of a person at risk of heat stroke and the place where the person is, and to encourage rescue by those around him. To provide a mutual watching system, a mutual watching method, and a watching unit that enable quick and appropriate rescue activities in the event of a risk of heat stroke. In a mutual monitoring system 1, a detection unit 2 that detects an abnormality of one user transmits abnormality occurrence information to a communication unit 4, and the communication unit 4 that receives the abnormality occurrence information sends a notification lamp 7 and a specific lamp. 8 and the notification lamp 7 and the specific lamp 8 that transmit the abnormality occurrence information to the communication unit 4 in the other watching unit U and receive the abnormality occurrence information notify the occurrence of the abnormality, and in the other watching unit U, one The communication unit 4 that has received the abnormality occurrence information from the communication unit 4 in the monitoring unit U transmits the abnormality occurrence information to the notification lamp 7, and the notification lamp 7 notifies the occurrence of the abnormality. [Selection diagram] Fig. 1【課題】熱中症の危険性がある者の周囲の者に対して、熱中症の危険性がある者の存在、及び、その者がいる場所を報知し、周囲の者による救助を促して、熱中症の危険性が発生した際に迅速かつ適切に救護活動を行うことを可能とする、相互見守りシステム、相互見守り方法、及び、見守りユニットを提供する。【解決手段】相互見守りシステム１は、一の使用者の異常を検知した検知部２が通信部４に異常発生情報を送信し、異常発生情報を受信した通信部４が報知ランプ７、特定ランプ８、及び、他の見守りユニットＵにおける通信部４に異常発生情報を送信し、異常発生情報を受信した報知ランプ７及び特定ランプ８が異常の発生を報知し、他の見守りユニットＵにおいて、一の見守りユニットＵにおける通信部４から異常発生情報を受信した通信部４が、報知ランプ７に異常発生情報を送信し、報知ランプ７が異常の発生を報知する。【選択図】図１
