The present invention relates to a door sealing element for sealing a gap between a movable door and a stationary floor side mating face, comprising two pieces of flexible tubing which are connected to each other such that they communicate on one end, namely a first piece of tubing, to be provided in the region of the door edge on the gap side, and a second piece of tubing, to be provided in the region of a door edge to be moved against a stationary stop surface in a closed position of the door.