designations where possible fig2 is a perspective view of an assembly of a back cover and rear supporter of a dryer referring to fig2 a drum 60 is rotatably provided within a dryer and a heater 80 heating air to make hot and dry is provided under the drum 60 a rear end of the drum 60 is supported by a rear supporter 70 that is assembled to a back cover 100 the rear supporter 70 includes a support plate 71 and a projected part 72 the projected part 72 having a circular shape is provided to a front side of the support plate 71 to fit a rim of the drum 60 the projected part 72 is inserted in a rear side of the drum 60 to be fixed thereto locking holes 75 and 75 a are formed at the support plate 71 and the back cover 100 to correspond to each other whereby a screw is fitted into the locking holes 75 and 75 a hence the rear supporter 70 is fixed to the back cover 100 as well as supports the rear side of the drum 60 a portion 76 of a rear side of the rear supporter 70 is open so that the hot and dry air generated from the heater 80 can be supplied inside the drum 60 the open portion 76 communicates with the heater 80 via an air duct 82 and a multitude of holes 84 are provided.