Chair backrest

The utility model relates to a chair backrest. The chair backrest comprises an inner plate and an outer plate, wherein the inner plate and the outer plate are in bucking connection through a concealed button, the concealed button is arranged between the inner plate and the outer plate and comprises a female button and a male button, the female button is fixedly arranged on the inner side of the inner plate, the male button is fixedly arranged on the inner side of the outer plate, a through hole is arranged at the fixed position of the female button on the inner plate and is communicated with the button hole of the female button, and the male button is inserted into the button hole of the female button; the button hole of the female button is provided with multiple reverse gears which are overturned in the insertion direction of the male direction and are matched with the male buckle in a clamping manner. According to the chair backrest, the inner plate and the outer plate are connected in a buckling manner, and no screw head is exposed outside, so that the appearance of the chair backrest is not influenced; besides, the mounting of the chair backrest is quite convenient.