The invention discloses a sound box, and the sound box comprises a top shell module group and a bottom shell module group. The top shell module group comprises a first loudspeaker assembly and a top shell assembly, and the bottom shell module group comprises a bottom shell assembly, a lifting device with the bottom being connected with the bottom shell assembly, and an elastic component with the bottom being connected with the lifting device. The top of the lifting device and the first loudspeaker assembly are connected with the top of the elastic component, and the top shell assembly is connected to a side, far from the elastic component, of the first loudspeaker component. The lifting device is disposed in the elastic component. The first loudspeaker assembly, the elastic component and the lifting device form a cavity through enclosing, and the lifting device and the elastic component simultaneously stretch out and draw back to adjust the size of the cavity and to control the openingor closing of the cavity. The sound box provided by the invention occupies a small space when being not in use, and is convenient to carry.