The present disclosure provides a stethoscope head assembly. The stethoscope head assembly comprises a diaphragm and a main body. The diaphragm comprises a membrane portion, and a sealing portion extending from a periphery of the membrane portion and comprising a ring-shaped raised platform and a connecting portion extending downwardly from a periphery of the ring-shaped raised platform. The main-body is detachably coupled to the diaphragm and comprises a sound gathering member. The connecting portion and the ring-shaped raised platform of the diaphragm cooperatively form a ring-shaped receiving slot for receiving the sound gathering member of the main body.
