PLUG DOOR DEVICE

One aspect of the present invention provides a plug door device 1 including a stationary base 3 fixedly attached to a body of a vehicle, a slidable base 4 having a door 2 attached thereto to open or close a doorway 15 of the vehicle, where the slidable base 4 being movable in a width direction of the vehicle relative to the stationary base 3 when acted upon by a driving force from a drive source 6, and a restricting mechanism 40 for restricting the slidable base 4 from moving in the width direction when the door 2 is fully closed. The restricting mechanism 40 includes two stationary members 42 fixedly attached to the stationary base 3, where the stationary members 42 each have a restricting part 41, two movable members 43 attached to two portions of the slidable base 4 that are separate from each other in a front-rear direction of the vehicle, and a connecting shaft 44 connecting together the two movable members 43. When the door 2 is fully closed, the two movable members 43 touch the restricting parts 41, so that the slidable base 4 is restricted from moving in the width direction.