The present invention relates to a respiratory sensing device which is attached to a body of a patient, uses piezoelectric effects to sense vibration generated from respiration of the patient, and obtains information on respiratory state of the patient. The device comprises: a piezoelectric film which includes a piezoelectric material in a form of a thin film, an upper electrode placed on an upper part of the piezoelectric material and a lower electrode placed on a lower part of the piezoelectric material, wherein the piezoelectric material is placed between the upper and lower electrodes, and which generates electric signals to the upper and lower electrodes according to vibration generated from respiration of the patient an adhesive layer which is placed to face the lower electrode in a lower part of the piezoelectric film, is provided as an adhesive material to contact and adhere to the body of the patient, transmits vibrations generated from the respiration of the patient to the piezoelectric film, and electrically connects an upper surface and a lower surface thereof because of conductivity thereof and an insulating film which is interposed between the piezoelectric film and the adhesive layer, and blocks electric connections between the piezoelectric film and the adhesive layer. The insulating film comprises a through-hole electrically connecting the lower electrode to the adhesive layer, so that the lower electrode is grounded to the body of the patient through the adhesive layer in order to reduce noises of electric signals from the piezoelectric phenomenon.본 발명은, 환자의 신체에 부착되고, 압전 효과를 이용하여 상기 환자의 호흡으로 인해 발생하는 진동을 감지함으로써 상기 환자의 호흡 상태에 관한 정보를 획득하는 호흡 센싱 디바이스(Respiratory sensing device)로서, 박막 형태의 압전 소재, 상기 압전 소재를 사이에 두고 상기 압전 소재의 상부에 위치하는 상부 전극 및 상기 압전 소재의 하부에 위치하는 하부 전극을 구비하고, 상기 환자의 호흡으로 인해 발생한 진동에 따라 상기 상부 전극 및 상기 하부 전극에 전기적 신호를 발생시키는 압전 필름, 상기 압전 필름의 하부에 상기 하부 전극과 마주보도록 위치하고, 접착성 물질로 제공되어 상기 환자의 신체에 접촉 부착되고, 상기 환자의 호흡으로 인해 발생하는 진동을 상기 압전 필름에 전달하며, 전도성을 띔으로써
