PROBLEM TO BE SOLVED: To provide a device and system that is less likely to perform erroneous detection and are capable of detecting and monitoring a patients action such as a bed-leaving motion by using a simple configuration without restraining the patients action through apparatus mounting etc.SOLUTION: A contact detection device comprises: voltage detection means for detecting a voltage variation caused by electromagnetic induction generated by a human body contacting with a conductive object and communication means capable of notifying the outside of information on the detected voltage variation. The conductive object and the voltage detection means are connected electrically.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】誤検知が少なく、かつ器具装着などにより患者の行動を拘束することがない簡易な構成により、離床動作等の行動を検知及び監視する装置及びシステムを提供する。【解決手段】導電性の対象物に人体が接触することによって生じる電磁誘導による電圧変化を検出する電圧検出手段と、当該検知した電圧変化の情報を外部に通知可能な通信手段とを備えており、導電性の対象物と電圧検出手段とが電気的に接続されていることを特徴とする、接触検知装置。【選択図】図1