rotated in the tub 4 operations of the drum type washing machine according to the present invention are as follows if the laundry is inputted into the drum 6 and a power switch is turned on washing water is introduced into the tub 6 at this time the front side of the tub 6 is fixed to the cabinet 2 and the gasket 14 is connected between the rear side of the tub 6 and the supporting plate 12 thereby preventing the washing water introduced into the tub 6 from being leaked outwardly if the introduction of the washing water is completed the driving motor 8 mounted at the rear side of the supporting plate 12 is driven and the drum 6 connected with the driving motor 8 by the rotation shaft 16 is rotated thereby performing washing and dehydration operations at this time the assembly composed of the drum 6 the driving motor and the supporting plate 12 is supported by the buffering springs 24 and the dampers 28 mounted between the supporting plate 12 and the inner wall of the cabinet 20 fig6 is a front sectional view of a drum type washing machine according to a second embodiment of the present invention the drum type washing machine according to the second embodiment of the present invention has the same construction and operation as that of the first to embodiment except a shape of the tub that is the tub 40 according to the second embodiment has a straight line portion 42 with a predetermined length at both sides thereof the straight line portion 42 is fixed to the inner wall of both sides of the cabinet 2 or integrally formed at the wall surface of both sides of the cabinet 2.