The utility model discloses a card box which comprises a box body, a card containing cavity is formed in the box body and can be used for containing cards, a box opening is formed in one end of the card containing cavity, and the cards can enter and exit from the card containing cavity through the box opening. A sliding groove extending in the vertical direction is formed in the outer side wall of the box body, a sliding opening is formed in the side, away from the box body, of the sliding groove, an upper blocking strip is arranged at the top of the sliding groove, a lower blocking strip is arranged at the bottom of the sliding groove, and a sliding cover plate is arranged on the sliding opening. The sliding cover plate, the upper barrier strip, the lower barrier strip and the sliding groove can define a storage bin, and the sliding cover plate can slide up and down along the sliding opening so as to open the storage bin. The storage box is reasonable in structural design, one storage bin is additionally arranged, the storage bin can be opened and closed by sliding the cover plate up and down along the sliding opening, and the storage box is very convenient to use.