Abstract: To provide a door structure capable of avoiding from resident confinement in the event of a big earthquake. An upper wall 3 which inclines upward from a horizontal direction in a door-opening direction X is provided on an upper portion of a door body 1. Correspondingly, an inclined plane 12 is provided on a door head 11. Further, a rotary member such as a roller which is in touch with a door sill is provided at a lower wall of door body 1. With this structure, if a door frame 10 is distorted by an earthquake, door frame 10 pushes upper wall 3 of door body 1, resulting in a force exerting to door body 1 in a door-opening direction. The rotary member provided to the lower wall facilitates a door-opening action.