An optical disk player has a clamping device which includes a substrate, a support frame that is pivotably coupled to the substrate, a gripping plate carried on the support frame and extending into the opening, and a slider coupled for slidable movement on the substrate. The slider has a block with an angled surface along which a projecting tab on the support frame travels when the slider is moved. The slider also has a pressing tab that presses the gripping plate through the opening to fix a disk on to a turntable of the disk player.