Abstract: A doorstop device to automatically and securely fix the door to be retained at the same opened position comprises a door member 11 mounted on a bottom side of a door 10 and including a magnet 12 and an elastic fixing member 17, and a floor member 15 buried in a floor face 18 and having a movable piece 16 which is attracted to the magnet 12 and engages with the elastic fixing member 17. As the door opened, the movable piece 16 of the floor member 15 projects and attaches to the magnet 12 of the door member 11, and the elastic fixing member 17 presses and holds the movable piece 16, thereby fixing the door 10 to be retained at the same position.