A shoe comprises a sole and an upper positioned above the sole and having a height so as to cover up to an ankle. The upper comprises a lower upper including a tongue for covering an instep, right and left side parts having a height so as to cover an anklebone and gradually reduced in height backward, and a rear part which connects the right and left side parts, and a higher upper having a height so as to cover the ankle from a position in which an upper region of the lower upper is overlapped, one end connected to the right side part of the lower upper, a middle region partially and sequentially overlapping with the right side part, the rear part and the left side part of the lower upper, and a fixing part connected to the left side part and detachably connected to a hook and loop fastener of the higher upper.