Problem to be solved: to provide a fixing device for the door and a door device including the fixed structure which can be coupled to either of the directions in the direction of movement of the door from the direction of movement of the door.Solution: a fitting concave portion into which the fitting projection of the fixture is inserted into the fixture to be coupled to the fixture to which the fitting projection is projected, and a pair of guide inclined surfaces formed on both sides of the fitting recess in the direction of movement of the first door are provided.By moving the first door, the fitting projection of the fixed fixture is guided to the fitting recess while abutting on one of the guide slanting surfaces, and is inserted into the fitting recess.Diagram
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