Disclosed is a micro loudspeaker. The casing of the micro loudspeaker comprises an upper side surface and a lower side surface. An electric connecting piece comprises a first deformation part located on one side of the upper side surface of the casing and side bent upwards, a second deformation part located on one side of the lower side surface and side bent downwards, a connecting part electrically connecting the first deformation part and the second deformation part. The top end of the first deformation part and the bottom end of the second deformation part are respectively provided with a first conducting part and a second conducting part. An electronic device comprises a micro loudspeaker mentioned above, a shell, a first sound hole and a circuit board, wherein a first conducting part or a second conducting part of the micro loudspeaker is electrically connected to the circuit board.