The present disclosure discloses a speaker box, including a housing with an accommodation space. The housing includes an upper case and a lower case. A speaker is received in the accommodation space. The speaker includes a diaphragm for producing sound. The speaker box further includes a passageway, a front sound cavity formed between the diaphragm and the upper case, a front cavity, a receiving slot formed in the upper case recessing from a side of the upper case adjacent to the diaphragm along a direction away from the diaphragm; and an air adsorbing layer received in the receiving slot, a steel piece engaging with the upper case and packaging the air adsorbing layer in the receiving slot, and a number of air adsorbing holes for communicating with the front sound cavity.