The present disclosure provides a photoplethysmograph device and a terminal, belonging to the technical field of terminals. The photoplethysmograph device includes a housing provided with a mounting hole； an optical device accommodated in the mounting hole； and a light-transmitting member including a first end face, a side face connected to the first end face, and a second end face away from the first end face and connected to the side face. The light-transmitting member is connected to the housing and blocks the mounting hole, and the first end face is disposed near the optical device； the side face includes a reflecting face configured to totally reflect light incident on the reflecting face from the first end face to the second end face so as to emit the light, or totally reflect light incident on the reflecting face from the second end face to the first end face so as to emit the light.
