The slide-rail bracket comprises an end plate and hanging columns. The end plate is provided with a fixing seat with a reception room in which there is provided with a spring and a corresponding open-hole. The columns comprise a first column and a second column which are set in the reception room and back against to the spring to telescopically move relative to the open-hole and the reception room. The first column and the second column can pass through the open-hole of the end plate, so that the bracket can be mounted on a support without tools.