A leg protector to protect a foot and a leg, the leg protector comprising: a bottom plate part configured to support the foot; a protection part formed to be connected to an upper side of the bottom plate part and to surround at least a portion of a rear surface portion and a lateral surface portion of the foot and the leg; a first sole comprising a first sole plate part provided at a lower portion of the bottom plate part and having a first curved part in which a plurality of curves are disposed in a direction from front to rear of the first sole plate part at a lower surface of the first sole plate part, and a plurality of lateral protrusions formed along a lateral surface of the first sole plate part; and a second sole comprising a second sole plate part detachably coupled to a lower portion of the first sole and having a second sole plate part with a second curved part formed in a curved shape corresponding to a shape of the first curved part at an upper surface of the second sole plate part and a lateral wall formed along a circumference of the second sole plate part and having a protrusion insertion recess, at an inner surface of the lateral wall, configured to allow the plurality of lateral protrusions to be insertable into the protrusion insertion recess, characterized in that in a state in which the second sole is coupled to the first sole, an inner side surface of the second sole surrounds the outer side surface of the first sole, the curved shape of each of the first curved part and the second curved part is a rounded shape, the plurality of lateral protrusions are formed at predetermined intervals and are inserted into the protrusion insertion recess, respectively, the plurality of lateral protrusions are formed at regions in the lateral surface of the first sole plate part, which convexly protrude toward the second sole, each of the plurality of lateral protrusions of the first sole comprises an upper edge and a lower edge; and the lower edge undergoes a gentler rounding treatment than the upper edge. a bottom plate part configured to support the foot; a protection part formed to be connected to an upper side of the bottom plate part and to surround at least a portion of a rear surface portion and a lateral surface portion of the foot and the leg; a first sole comprising a first sole plate part provided at a lower portion of the bottom plate part and having a first curved part in which a plurality of curves are disposed in a direction from front to rear of the first sole plate part at a lower surface of the first sole plate part, and a plurality of lateral protrusions formed along a lateral surface of the first sole plate part; and a second sole comprising a second sole plate part detachably coupled to a lower portion of the first sole and having a second sole plate part with a second curved part formed in a curved shape corresponding to a shape of the first curved part at an upper surface of the second sole plate part and a lateral wall formed along a circumference of the second sole plate part and having a protrusion insertion recess, at an inner surface of the lateral wall, configured to allow the plurality of lateral protrusions to be insertable into the protrusion insertion recess, characterized in that in a state in which the second sole is coupled to the first sole, an inner side surface of the second sole surrounds the outer side surface of the first sole, the curved shape of each of the first curved part and the second curved part is a rounded shape, the plurality of lateral protrusions are formed at predetermined intervals and are inserted into the protrusion insertion recess, respectively, the plurality of lateral protrusions are formed at regions in the lateral surface of the first sole plate part, which convexly protrude toward the second sole, each of the plurality of lateral protrusions of the first sole comprises an upper edge and a lower edge; and the lower edge undergoes a gentler rounding treatment than the upper edge.