PROBLEM TO BE SOLVED: To facilitate external installation of a load detector to an existent bed.SOLUTION: A load detector 10 is provided with: a pair of fixing portions 12, 14 fixed to a member (a transverse pipe 8a of a case, or an actuator pipe) of an electric bed which is deformed by the movement of a patient； a load cell 16 that detects a change in a load applied between the fixing portions 12, 14； and, as necessary, a fixture. The load detector 10 makes it possible to acquire biological information concerning the movement, breathing, heartbeat, and weight of the patient on the basis of the change in the load.SELECTED DRAWING: Figure 4【課題】荷重検出器を既存のベッドに容易に外付け可能とする。【解決手段】患者の動きにより変形する電動ベッドの部材（筐体の横パイプ８ａやアクチュエータパイプ）に固定される一対の固定部１２、１４と、該固定部１２、１４間に加わる荷重の変化を検出するロードセル１６と、必要に応じて固定具とを備えた荷重検出器１０であって、前記荷重の変化に基づいて、患者の動きや呼吸、心拍、体重に関する生体情報を取得できるようにする。【選択図】図４
