A drum type washing machine including a housing having an introduction port, a door to open and close the introduction port, a locking member provided at the door, a locking device provided at the housing to lock the locking member. The locking device has a first through hole and a first support extending from the perimeter of the first through hole. The housing has a second support extending from the perimeter of a second through hole, through which the first support is inserted, to support the outside of the first support in a plane contact state. The first support is prevented from being damaged due to impact during transportation.