PROBLEM TO BE SOLVED: To enable highly reliable and stable detection of biological information such as heartbeat and respiration of a subject without imposing a burden on the subject. A biological information monitoring device of one embodiment uses an antenna device including at least one antenna arranged close to a subject, a signal generation unit that generates a high-frequency signal, and the high-frequency signal. The physical displacement of the subject is detected based on the change in the coupling amount of the near-field coupling and the coupling amount detecting unit that detects the coupling amount of the near-field coupling due to the electric field between the subject and the antenna. It is provided with a displacement detection unit. [Selection diagram] Fig. 1【課題】被検体に負担をかけることなく、被検体の心拍や呼吸などの生体情報を、高い信頼性で安定に検出できるようにする。【解決手段】一実施形態の生体情報モニタ装置は、被検体に近接して配設される少なくとも１つのアンテナからなるアンテナ装置と、高周波信号を生成する信号生成部と、前記高周波信号を用いて、前記被検体と前記アンテナとの間の電界による近傍界結合の結合量を検出する結合量検出部と、前記近傍界結合の結合量の変化に基づき、前記被検体の物理的変位を検出する変位検出部と、を備える。【選択図】 図１
