Breathable office chair

The utility model provides a breathable office chair which comprises a pentagonal claw, a chair plate and a backrest, a transverse supporting plate is arranged at one end of the chair plate, vertical supporting plates are respectively arranged at two ends of the transverse supporting plate, and a top supporting plate is arranged at one end, far away from the transverse supporting plate, of each vertical supporting plate. A backrest is arranged on a supporting frame formed by the transverse supporting plate, the vertical supporting plate and the top supporting plate, the backrest is hollow, a partition plate is arranged in the backrest, filling sponge is arranged on one side of the partition plate, vent holes are formed in a back plate of the backrest, air holes are formed in the filling sponge, a leather layer is arranged on the face, making contact with the human body, of the backrest, and a breathable face is arranged on the leather layer. Crossed raised lines are adhered to the ventilating surface, and ven