A laundry treatment apparatus comprising: a cabinet; a tub provided in the cabinet for storing water; a water supply unit for supplying water to the tub; a drum rotatably provided in the tub for storing laundry; a drainage pipe configured to extend through a height higher than a maximum possible level of water in the tub to discharge the water out of the cabinet; a first drainage unit configured to move the water stored in the tub out of the cabinet; wherein the first drainage unit comprises: a first connection pipe communicating with the inside of the tub; a first discharge pipe connected to the drainage pipe; and a first pump comprising a first housing connected to the first connection pipe and the first discharge pipe, and an impeller rotatably provided in the first housing for discharging the water supplied from the first connection pipe to the first discharge pipe; characterized in that the laundry treatment apparatus further comprises a second drainage unit configured to prevent water from remaining in the first drainage unit; wherein the second drainage unit comprises: a second connection pipe connected to any one of a lower region of the tub, the first connection pipe and the first housing; a second discharge pipe connected to the drainage pipe; and a second pump moving the water supplied from the second connection pipe to the second discharge pipe and preventing water in the second discharge pipe from moving to the second connection pipe; wherein the second pump comprises a first gear and a second gear rotatably provided in a second housing, into which the water discharged from the tub is introduced, the second pump being configured to move the water introduced into the second housing to the drainage pipe when the first gear and the second gear are rotated. a cabinet; a tub provided in the cabinet for storing water; a water supply unit for supplying water to the tub; a drum rotatably provided in the tub for storing laundry; a drainage pipe configured to extend through a height higher than a maximum possible level of water in the tub to discharge the water out of the cabinet; a first drainage unit configured to move the water stored in the tub out of the cabinet; wherein the first drainage unit comprises: a first connection pipe communicating with the inside of the tub; a first discharge pipe connected to the drainage pipe; and a first pump comprising a first housing connected to the first connection pipe and the first discharge pipe, and an impeller rotatably provided in the first housing for discharging the water supplied from the first connection pipe to the first discharge pipe; a first connection pipe communicating with the inside of the tub; a first discharge pipe connected to the drainage pipe; and a first pump comprising a first housing connected to the first connection pipe and the first discharge pipe, and an impeller rotatably provided in the first housing for discharging the water supplied from the first connection pipe to the first discharge pipe; a second drainage unit configured to prevent water from remaining in the first drainage unit; wherein the second drainage unit comprises: a second connection pipe connected to any one of a lower region of the tub, the first connection pipe and the first housing; a second discharge pipe connected to the drainage pipe; and a second pump moving the water supplied from the second connection pipe to the second discharge pipe and preventing water in the second discharge pipe from moving to the second connection pipe; a second connection pipe connected to any one of a lower region of the tub, the first connection pipe and the first housing; a second discharge pipe connected to the drainage pipe; and a second pump moving the water supplied from the second connection pipe to the second discharge pipe and preventing water in the second discharge pipe from moving to the second connection pipe; wherein the second pump comprises a first gear and a second gear rotatably provided in a second housing, into which the water discharged from the tub is introduced, the second pump being configured to move the water introduced into the second housing to the drainage pipe when the first gear and the second gear are rotated.