A blood flow detection device and a blood flow detector thereof.The blood flow detector includes a shroud, a plurality of light transmitters, a plurality of light receivers, an attitude sensor and a signal output interface.The shroud includes a detection surface.The light emitter is arranged on the cover sheet and emits light from the detection surface.The light receiver is arranged on the shroud and exposed on the detection surface to receive the external light of the detection surface.The attitude sensor is arranged on the shroud to detect the attitude change of the blood flow detector.The signal output interface is connected to the optical receiver and the attitude sensor to output the detection signals of the optical receiver and the attitude sensor.一種血流偵測裝置及其血流偵測器。血流偵測器包含：披覆片、複數光發射器、複數光接收器、姿態感測器及訊號輸出介面。披覆片包含一偵測表面。光發射器設置於披覆片，而自偵測表面向外發光。光接收器設置於披覆片，而外露於偵測表面以接收偵測表面外部光線。姿態感測器設置於披覆片，以偵測血流偵測器之姿態變化。訊號輸出介面連接於光接收器及姿態感測器，以輸出光接收器與姿態感測器之偵測訊號。
