The present disclosure discloses a speaker box. The speaker box includes a housing which has a receiving space and a side wall having a sound hole, and a sound generator received in the receiving space and including a diaphragm including a dome and a periphery connected to the dome. The periphery includes a near-end which is near the sounding hole and a far-end which is farther the sounding hole. A width of the near-end of the periphery perpendicular to a vibration direction of the diaphragm is smaller than a width of the far-end of the periphery perpendicular to the vibration direction.