A drum type washing machine comprising: a body having a front surface thereof with an entrance opening for entrance/exit of laundry; a front door rotatably coupled at one end thereof to the front surface of the body and serving to open or close the entrance opening; a hook provided at a rear surface of the front door; a door latch assembly provided at the entrance opening, wherein the hook is configured to latch to the door latch assembly so as to lock the front door during a wash cycle of the drum type washing machine; and a supporting unit provided at the front door and configured to come into contact with the body when the entrance opening is closed or opened by the front door, thereby serving to keep a predetermined distance between the front door and the body to define a ventilation gap, wherein the supporting unit includes: a supporting body being movably placed between the front door and the body; a mount frame at an inner end of the front door and having an insertion hole so that the supporting body can insert into or protrude out of the insertion hole; a supporting elastic member installed in the mount frame and serving to support the supporting body so as to allow the supporting body to protrude out of the insertion hole when no external force is applied to the supporting body; a magnet formed at a tip end of the supporting body to magnetically couple the supporting unit to the body; and a noise-proof bump coupled to the tip end of the supporting body to prevent generation of noise when the supporting body comes into contact with the body, wherein the supporting body is configured to continue to contact with the body via the supporting elastic member when the hook is released from the door latch assembly, and wherein the magnet has a coupling hole at a center thereof, a distal portion of the noise-proof bump penetrates though the coupling hole and is formed with a fastening end such that said fastening end is caught by the magnet to achieve the fastening of the noise-proof bump. a body having a front surface thereof with an entrance opening for entrance/exit of laundry; a front door rotatably coupled at one end thereof to the front surface of the body and serving to open or close the entrance opening; a hook provided at a rear surface of the front door; a door latch assembly provided at the entrance opening, wherein the hook is configured to latch to the door latch assembly so as to lock the front door during a wash cycle of the drum type washing machine; and a supporting unit provided at the front door and configured to come into contact with the body when the entrance opening is closed or opened by the front door, thereby serving to keep a predetermined distance between the front door and the body to define a ventilation gap, wherein the supporting unit includes: a supporting body being movably placed between the front door and the body; a mount frame at an inner end of the front door and having an insertion hole so that the supporting body can insert into or protrude out of the insertion hole; a supporting elastic member installed in the mount frame and serving to support the supporting body so as to allow the supporting body to protrude out of the insertion hole when no external force is applied to the supporting body; a magnet formed at a tip end of the supporting body to magnetically couple the supporting unit to the body; and a noise-proof bump coupled to the tip end of the supporting body to prevent generation of noise when the supporting body comes into contact with the body, wherein the supporting body is configured to continue to contact with the body via the supporting elastic member when the hook is released from the door latch assembly, and wherein the magnet has a coupling hole at a center thereof, a distal portion of the noise-proof bump penetrates though the coupling hole and is formed with a fastening end such that said fastening end is caught by the magnet to achieve the fastening of the noise-proof bump. a supporting body being movably placed between the front door and the body; a mount frame at an inner end of the front door and having an insertion hole so that the supporting body can insert into or protrude out of the insertion hole; a supporting elastic member installed in the mount frame and serving to support the supporting body so as to allow the supporting body to protrude out of the insertion hole when no external force is applied to the supporting body; a magnet formed at a tip end of the supporting body to magnetically couple the supporting unit to the body; and a noise-proof bump coupled to the tip end of the supporting body to prevent generation of noise when the supporting body comes into contact with the body, wherein the supporting body is configured to continue to contact with the body via the supporting elastic member when the hook is released from the door latch assembly, and wherein the magnet has a coupling hole at a center thereof, a distal portion of the noise-proof bump penetrates though the coupling hole and is formed with a fastening end such that said fastening end is caught by the magnet to achieve the fastening of the noise-proof bump.