The body movement monitoring device is detected by a tension generating member that generates a tension according to the body motion of the bedridden person in the direction of gravity, a detection element that detects the body movement of the bedridden based on the tension, and the detection element. An identification device for identifying at least one of the first body movement caused by the respiration of the bedridden and the second body movement caused by the heartbeat of the bedridden. . 体動監視装置は、重力方向における臥床者の体動に応じた張力が発生する張力発生部材と、前記張力に基づいて前記臥床者の体動を検出する検出素子と、前記検出素子によって検出される前記臥床者の体動について、前記臥床者の呼吸によって生じる第１の体動及び前記臥床者の心拍によって生じる第２の体動のうちの少なくとも一方の体動を識別する識別装置とを備える。
