Binocular fusion for depth motion was examined using static random dot stererogram(SRDS) and dynamic random dot stereogram(DRDS). Depth motion was not elicited about more than 15Hz for the sinusoidal wave modulation, 7.5Hz for the rectangular wave modulation of SRDS and 7.5Hz for DRDS. The maximum disparity for DRDS was greater than the one for SRDS, when the center of depth motion was set on the position of the screen. But, when the center was changed, the one of DRDS was less than the one of SRDS, or depth motion was not visible at high temporal frequency.