A motor for a washing machine, comprising: a stator including a coil portion; and a rotor, disposed radially outside the stator, the rotor including: a rotor casing including a base portion having a disk shape and a vertical wall extending substantially perpendicularly from an outer periphery of the base portion, a permanent magnet provided on an inner surface of the vertical wall of the rotor casing, and a connecting member provided at a center of the base portion of the rotor casing and connected with a shaft, the base portion of the rotor casing includes: a first ring portion extending from the vertical wall to a second ring portion, the first ring portion facing, in an axial direction of the rotor, the coil portion, and wherein the second ring portion is provided with a plurality of air inlet holes, and is disposed between the first ring portion and the connecting member so as not to face, in the axial direction of the rotor, the coil portion of the stator, characterized in that the second ring portion protrudes axially from the first ring portion toward the stator and air flows to the coil portion of the stator through the plurality of air inlet holes and cools the coil portion of the stator, wherein the second ring portion includes a side wall protruding from an inner circumferential surface of the first ring portion toward the stator and an upper wall extending from the side wall toward the connecting member and in parallel with the first ring portion, and the plurality of air inlet holes are disposed in the side wall of the second ring portion. a stator including a coil portion; and a rotor, disposed radially outside the stator, the rotor including: a rotor casing including a base portion having a disk shape and a vertical wall extending substantially perpendicularly from an outer periphery of the base portion, a permanent magnet provided on an inner surface of the vertical wall of the rotor casing, and a connecting member provided at a center of the base portion of the rotor casing and connected with a shaft, the base portion of the rotor casing includes: a first ring portion extending from the vertical wall to a second ring portion, the first ring portion facing, in an axial direction of the rotor, the coil portion, and wherein the second ring portion is provided with a plurality of air inlet holes, and is disposed between the first ring portion and the connecting member so as not to face, in the axial direction of the rotor, the coil portion of the stator, a rotor casing including a base portion having a disk shape and a vertical wall extending substantially perpendicularly from an outer periphery of the base portion, a permanent magnet provided on an inner surface of the vertical wall of the rotor casing, and a connecting member provided at a center of the base portion of the rotor casing and connected with a shaft, the base portion of the rotor casing includes: a first ring portion extending from the vertical wall to a second ring portion, the first ring portion facing, in an axial direction of the rotor, the coil portion, and wherein the second ring portion is provided with a plurality of air inlet holes, and is disposed between the first ring portion and the connecting member so as not to face, in the axial direction of the rotor, the coil portion of the stator, characterized in that the second ring portion protrudes axially from the first ring portion toward the stator and air flows to the coil portion of the stator through the plurality of air inlet holes and cools the coil portion of the stator, wherein the second ring portion includes a side wall protruding from an inner circumferential surface of the first ring portion toward the stator and an upper wall extending from the side wall toward the connecting member and in parallel with the first ring portion, and the plurality of air inlet holes are disposed in the side wall of the second ring portion.