Abstract: A ski boot that satisfies both the ease of operation and a sense of fitness, having a shell including a lower shell for covering mainly a part lower than the ankle, an inner cuff fixed to the lower shell for covering mainly an upper part above the ankle, and an outer cuff fixed to the lower shell and the inner cuff to be clamped by buckles in a manner to wrap the inner cuff from outside. The lower shell is restricted to rise at both side portions thereof at both sides of the leg approximately to a height of the ankle. The inner cuff includes at least side walls for covering the upper part above the ankle at both sides of the leg and, front walls for supporting the shin. To the outer cuff are fixed upper buckles for clamping a calf portion and lower buckles for clamping an ankle portion.