FIGS. 24A and 24B are a front view and a right side view, respectively, of the cleaning blade 220 in the case of applying voltages of the same phase to the vibration application members 221 in PZT in-plane directions of the blade member 223 indicated by arrow in FIG. 24A. In the case of applying voltage in the same phase as shown in FIG. 24A, unless affected greatly by a mode of vibration at the t