A body for a skate boot includes a sole portion, a toe portion extending from a front end of the sole portion, two upper portions extending from two sides of the sole portion, and a heel portion extending from a rear end of the sole portion. The sole portion, toe portion, upper portions and heel portion are made of fiber laminations constructed by multiple layers of fiber fabrics and epoxy resin by means of hot-pressing in a die. At least one thermoplastic substratum is provided in the fiber laminations at the upper portions and heel portion, and has two sewn portions respectively formed at two distal ends at the upper portions and extending out from the fiber laminations inside the thermoplastic substratum. Thus, the body is light-weight, has good shock resistance, and can cover the user's foot well.