811 a on the tub cover 800 and as shown in fig3 a a damping member 815 may preferably be provided at the outlet p side of the main passage w 1 so that the washing water hits the damping member 815 beforehand for effective prevention of the scattering of the washing water occurred when the washing water hits the vertical deflectors 813 the damping member 815 is disposed substantially perpendicular to a flow direction of the washing water i e connected from a fore end of the supplementary deflector 814 to a fore end of the main deflector 812 with a height lower than heights of the main deflector 812 and the supplementary deflector 814 as shown in fig3 b instead of the damping member a sloped portion 817 may be provided at an outlet p of the main flow passage the following eighth embodiment tub cover is a modification from the seventh embodiment tub cover to suit to a case of both direction i e regular and reverse direction rotation of the inner tub 103 an overall structure of the eighth embodiment tub cover will be explained with reference to fig8 alike the seventh embodiment tub cover the eighth embodiment tub cover 800 of the present invention also includes the main deflectors the supplementary deflectors and the vertical deflectors except that first main deflectors 812 and second main deflectors 812 a are provided in correspondence to the both direction rotation and a structure of the supplementary deflectors 814 a is modified in detail the first main deflectors 812 are formed on an underside of the upper surface portion of the tub cover 800 at fixed intervals and the second deflectors 812 a.