A laundry treatment apparatus comprising: a cabinet to form the external appearance of the laundry treatment apparatus , the cabinet having an opening ; a drawer configured to be withdrawable from the cabinet through the opening ; a tub provided inside the drawer and configured to receive water; an introduction aperture provided to penetrate the upper surface of the tub ; and a drum rotatably provided inside the tub for receiving laundry supplied to the introduction aperture ; characterized by : a door configured to open and close the introduction aperture , the door being coupled to one of the drawer or the tub and a door sensing unit configured to sense whether or not the door to open the introduction aperture is opened, wherein the door sensing unit includes: a magnetic-force sensor provided at the inner side of the cabinet facing the upper surface of the door , and a magnetic-force generator rotatably provided at the inner side of the cabinet and spaced apart from the magnetic-force sensor , wherein a distance between the sensor and the magnetic-force generator is changed as the door opens the introduction aperture and the door rotates the magnetic-force generator . a cabinet to form the external appearance of the laundry treatment apparatus , the cabinet having an opening ; a drawer configured to be withdrawable from the cabinet through the opening ; a tub provided inside the drawer and configured to receive water; an introduction aperture provided to penetrate the upper surface of the tub ; and a drum rotatably provided inside the tub for receiving laundry supplied to the introduction aperture ; characterized by : a door configured to open and close the introduction aperture , the door being coupled to one of the drawer or the tub and a door sensing unit configured to sense whether or not the door to open the introduction aperture is opened, wherein the door sensing unit includes: a magnetic-force sensor provided at the inner side of the cabinet facing the upper surface of the door , and a magnetic-force generator rotatably provided at the inner side of the cabinet and spaced apart from the magnetic-force sensor , wherein a distance between the sensor and the magnetic-force generator is changed as the door opens the introduction aperture and the door rotates the magnetic-force generator . a door configured to open and close the introduction aperture , the door being coupled to one of the drawer or the tub and a door sensing unit configured to sense whether or not the door to open the introduction aperture is opened, wherein the door sensing unit includes: a magnetic-force sensor provided at the inner side of the cabinet facing the upper surface of the door , and a magnetic-force generator rotatably provided at the inner side of the cabinet and spaced apart from the magnetic-force sensor , wherein a distance between the sensor and the magnetic-force generator is changed as the door opens the introduction aperture and the door rotates the magnetic-force generator . a magnetic-force sensor provided at the inner side of the cabinet facing the upper surface of the door , and a magnetic-force generator rotatably provided at the inner side of the cabinet and spaced apart from the magnetic-force sensor , wherein a distance between the sensor and the magnetic-force generator is changed as the door opens the introduction aperture and the door rotates the magnetic-force generator . <EOS>