Powder box

The utility model provides a powder box, and relates to the technical field of printers. The powder box comprises a box body, a powder bin, a bin door, a linkage piece and a button assembly. The powder bin and the bin door are arranged in the box body, the powder bin is provided with a supply port used for conveying a developing agent, and the bin door is slidably connected with the powder bin; the linkage part is slidably connected with the box body and fixedly connected with the bin door, the button assembly is movably arranged on the box body and provided with a first limiting face, and the linkage part is provided with a first abutting face. The linkage part is driven by the button assembly to slide in the first direction, when the first limiting face abuts against the first abutting face, the button assembly stops driving the linkage part, the supply port can be completely opened, and the button assembly limits the linkage part to slide in the direction opposite to the first direction so that the supply