The purpose of the present study was to clarify how the movement process changed in the cross-jump suited one's pace and how the process of change influenced in the failure of cross-jump in the Prescribed width. The experiment was devided into two parts. In the experiment l, the movement process of cross-jump suited one's pace was analyzed and the jump process of those who failed the cross-jump was analyzed in the experiment 2. Kindergarten childeren from 5 to 6 years of age (n=152) participated in these experiments. The findings were summarized as follows: 1. The process of jump suited one's pace was structured from three phases of a considerable increase -maximum (or peak)- gradual decease of jump distance. 2. It was inferred that the change process of the considerable increase-maximum (or peak)-gradual decrease influenced in the failure of cross-jump. 3. The failure of cross-jump occured more often in case of the big difference between prescribed width and jump distance. 4. Those who failed the cross-jump leaped over irregularly at a time and it was assumed that the irregular jump brought about a failure to the smooth movement.