A laundry machine comprising: a tub; a drum mounted in the tub and configured to wash laundry; and a drive unit connected to a drum shaft penetrating the tub and configured to drive the drum, the drive unit comprising: a stator fixed to an outer surface of a bottom wall provided in the tub; and a rotor coupled to the drum shaft and supported to rotate, with surrounding the stator, wherein the rotor comprises a rotor frame, a magnet, and a connector for connecting the rotor frame and the drum shaft with each other, and the rotor frame comprises, a side wall for seating the magnet therein, a bottom wall horizontally extended from a lower end of the side wall, and an air inlet part formed in the bottom wall, wherein the air inlet part comprises: an external air inlet channel projected from the bottom wall toward the stator and comprising an inner wall formed in an inner radial portion, an outer wall formed in an outer radial portion, an upper wall connecting the inner wall and a top of the outer wall with each other, and a front wall connecting the inner wall and a front end of the outer wall with each other; and an opening vertically formed in the bottom wall and configured to draw external air guided by the inner wall, the upper wall and the outer wall into an interior of the rotor frame. a tub; a drum mounted in the tub and configured to wash laundry; and a drive unit connected to a drum shaft penetrating the tub and configured to drive the drum, the drive unit comprising: a stator fixed to an outer surface of a bottom wall provided in the tub; and a rotor coupled to the drum shaft and supported to rotate, with surrounding the stator, wherein the rotor comprises a rotor frame, a magnet, and a connector for connecting the rotor frame and the drum shaft with each other, and the rotor frame comprises, a side wall for seating the magnet therein, a bottom wall horizontally extended from a lower end of the side wall, and an air inlet part formed in the bottom wall, wherein the air inlet part comprises: an external air inlet channel projected from the bottom wall toward the stator and comprising an inner wall formed in an inner radial portion, an outer wall formed in an outer radial portion, an upper wall connecting the inner wall and a top of the outer wall with each other, and a front wall connecting the inner wall and a front end of the outer wall with each other; and an opening vertically formed in the bottom wall and configured to draw external air guided by the inner wall, the upper wall and the outer wall into an interior of the rotor frame. a stator fixed to an outer surface of a bottom wall provided in the tub; and a rotor coupled to the drum shaft and supported to rotate, with surrounding the stator, wherein the rotor comprises a rotor frame, a magnet, and a connector for connecting the rotor frame and the drum shaft with each other, and the rotor frame comprises, a side wall for seating the magnet therein, a bottom wall horizontally extended from a lower end of the side wall, and an air inlet part formed in the bottom wall, wherein the air inlet part comprises: an external air inlet channel projected from the bottom wall toward the stator and comprising an inner wall formed in an inner radial portion, an outer wall formed in an outer radial portion, an upper wall connecting the inner wall and a top of the outer wall with each other, and a front wall connecting the inner wall and a front end of the outer wall with each other; and an opening vertically formed in the bottom wall and configured to draw external air guided by the inner wall, the upper wall and the outer wall into an interior of the rotor frame. an external air inlet channel projected from the bottom wall toward the stator and comprising an inner wall formed in an inner radial portion, an outer wall formed in an outer radial portion, an upper wall connecting the inner wall and a top of the outer wall with each other, and a front wall connecting the inner wall and a front end of the outer wall with each other; and an opening vertically formed in the bottom wall and configured to draw external air guided by the inner wall, the upper wall and the outer wall into an interior of the rotor frame.