The present disclosure provides a loudspeaker, a loudspeaker device and a mobile terminal. The loudspeaker includes: a frame having an outer circumferential side wall, an inner circumferential side wall arranged opposite to the outer circumferential side wall, and an acoustic output hole penetrating the outer circumferential side wall and the inner circumferential side wall; a diaphragm having a periphery connected with the frame along a circumferential direction; and a drive assembly comprising a first driving member fixed to the diaphragm and a second driving member fixed to the frame, the first driving member being vibratory relative to the second driving member to drive the diaphragm to vibrate, thereby emitting a sound wave and making the sound wave pass through the acoustic output hole.