length of the projection 415 may be formed shorter for providing the sealing member 417 in a space formed below the projection 415 and as shown in fig6 the sealing member may be disposed on a top end of the outer tub 102 in detail as the sealing member 417 is fitted to the top end of the outer tub 102 a support 102 b is projected in an outward radial direction of the outer tub 102 from a portion below the top end portion 102 a of the outer tub 102 and a horizontal portion 441 is formed at an outer circumference of the upper surface portion 411 of the tub cover 400 with an end of the horizontal portion 441 bent downward to form a tight fit portion 413 which fit to an inside surface of the support 102 b in the outer tub 102 without providing the fastening portion and in order to make the assembly easy the sealing member 417 is preferably attached to the horizontal portion 441 of the tub cover with adhesive 452 and it is preferable that a position the support 102 b in the outer tub 102 is projected is to be below the top end of the outer tub 102 to provide a space between the top end 102 a of the outer tub 102 and the support 102 b because if leakage of the washing water is happened despite of the sealing member 417 the leakage of washing water may be collected in the space the washing.