A dishwasher comprising: a main body in which a washing tub is formed; a sump provided in the main body and storing washing water; a plurality of injection nozzles (311, 313, 320) to inject the washing water into the washing tub; a plurality of flow passages (131, 132) respectively connected to the plurality of injection nozzles; and a distribution apparatus configured to selectively open and close the plurality of flow passages, and including a rotary member having a plurality of independent connection passages (224, 225, 226) communicating with the plurality of flow passages, respectively, and a case in which the rotary member is accommodated, characterised in that the distribution apparatus is further disposed below and in line with one of the plurality of flow passages; and the dishwasher further comprises: a gear portion integrally provided at one side of the rotary member; a motor disposed below the distribution apparatus and including a driving gear connected to a rotation shaft of the motor; and a connection gear located between and configured to engage with the driving gear and the gear portion wherein the connection gear may be rotated in the clockwise or counter-clockwise direction by the driving force of the motor, and wherein the rotary member is rotated by receiving a driving force from the motor through the driving gear, the connection gear and the gear portion, such that when at least one of the plurality of connection passages (224, 225, 226) is opened, the washing water flows to a flow passage communicating with the at least one connection passage (224, 225, 226). a main body in which a washing tub is formed; a sump provided in the main body and storing washing water; a plurality of injection nozzles (311, 313, 320) to inject the washing water into the washing tub; a plurality of flow passages (131, 132) respectively connected to the plurality of injection nozzles; and a distribution apparatus configured to selectively open and close the plurality of flow passages, and including a rotary member having a plurality of independent connection passages (224, 225, 226) communicating with the plurality of flow passages, respectively, and a case in which the rotary member is accommodated, characterised in that the distribution apparatus is further disposed below and in line with one of the plurality of flow passages; and the dishwasher further comprises: a gear portion integrally provided at one side of the rotary member; a motor disposed below the distribution apparatus and including a driving gear connected to a rotation shaft of the motor; and a connection gear located between and configured to engage with the driving gear and the gear portion wherein the connection gear may be rotated in the clockwise or counter-clockwise direction by the driving force of the motor, and wherein the rotary member is rotated by receiving a driving force from the motor through the driving gear, the connection gear and the gear portion, such that when at least one of the plurality of connection passages (224, 225, 226) is opened, the washing water flows to a flow passage communicating with the at least one connection passage (224, 225, 226). a gear portion integrally provided at one side of the rotary member; a motor disposed below the distribution apparatus and including a driving gear connected to a rotation shaft of the motor; and a connection gear located between and configured to engage with the driving gear and the gear portion wherein the connection gear may be rotated in the clockwise or counter-clockwise direction by the driving force of the motor, and wherein the rotary member is rotated by receiving a driving force from the motor through the driving gear, the connection gear and the gear portion, such that when at least one of the plurality of connection passages (224, 225, 226) is opened, the washing water flows to a flow passage communicating with the at least one connection passage (224, 225, 226).