A description fig1 represents a fully automatic clothes washing machine according to the present invention which includes a body 1 the body 1 includes a side wall 1a and an openable cover 1b at an upper end thereof the body 1 surrounds a water container 2 which retains washing water therein and a washing tank 3 which receives clothing the water container 2 includes a washing tank 3 having an inner bottom 3a an outer bottom 3b and a heating apparatus 6 mounted therebetween the washing tank 3 has a pulsator 4 positioned therein which is connected to a gear box 5a and is operated by the driving force of a motor 5 on a first side of the water container 2b is formed a washing water drainoutlet 7 which is connected to an overflow pipe 8 the present invention relates to inner cover apparatus 11 for an automatic washing machine for opening and closing a top portion 25 of the water container 2 wherein the water container 2 includes a supporting member 10 attached to a top portion of the periphery 26 of the water container 2 the support member 10 is further attached to an inner cover apparatus 11 at a first end 10a to open and close the top portion of the water container 2 the support member 10 is integrally attached to the outer periphery 26 along the top portion 25 of the water container 2 and includes a coupling rim 12 fitted onto the top side of the water container 2.