12 a pulsator 16 rotatably mounted in the cleansing basket 14 a transmission 70 for controlling the rotating direction of the pulsator 16 and the cleansing basket 14 and a floatage clutch 80 for allowing the cleansing basket 14 to selectively cooperate with the pulsator 16 by being intermittently actuated depending on the existence and nonexistence of water here the pulsator 16 is rotatably mounted on the bottom surface of the cleansing basket 14 and includes a wing part 161 for forming a water stream and a hub part 162 disposed in the center of the wing part 161 the transmission 70 includes a hollow dryer shaft 72 integrated to the bottom surface of the cleansing basket 14 several bearings 76 supporting the hollow dryer shaft 72 and a washing shaft 74 mounted to penetrate the hollow dryer shaft 72 the upper end of the washing shaft 74 is fixed to the hub part 162 of the pulsator 16 and the lower end of the washing shaft 74 is connected with the motor 22 in addition the floatage clutch 80 includes a float 82 coupled with the washing shaft 74 to be capable of moving up and down and a fixed member 83 fixed to the upper end of the hollow dryer shaft 72 the fixed member can be separated from and coupled with the float at the lower side of the float the float 82 includes a hub portion 821 to be coupled with a serration portion of the washing shaft 74 and a tube portion 822 constructed around the hub portion 821 the hub portion 821 of the float 82 is formed with.