above described rinse mode the washing machine is operated in a dehydration mode for dehydrating the laundry m that is when the motor 80 rotates the drum 70 at a high speed the laundry m contained in the drum 70 is centrifugally dehydrated and then moisture exhausted from the laundry m is collected in the tub 60 through the holes 74 of the drum 70 and discharged to the outside through the drain exhaust hose 122 and the drain exhaust pump 126 in case that the shielding plugs 100 are respectively separated from the air suction ports 92 prior to or during the dehydration mode external air a is sucked into the drum type washing machine through the opened air suction ports 92 and the sucked air contacts the laundry m through the inside of the gasket 128 and the openings 61 and 71 of the tub 60 and the drum 70 thereby assisting the laundry m to be dried further the heating means 110 are operated in the dehydration mode thereby heating and drying the air sucked into the drum type washing machine through the air suction ports 92 then the heated and dried air promotes the laundry m.