Abstract: The invention relates to a set of landing doors (19) and elevator car doors (21) as a replacement for existing swing doors without requiring any substantial masonry work, any change in the structure of the car or in the displacement of the latter, the space between the car frame (13) and the landing access opening frame (3) being of 125 mm at the most, characterized in that it comprises a set of landing doors (19) positioned just behind the landing access opening frame (3) and provided with a set of one panel and two telescopic panels with a central opening, the total thickness of which is reduced, and a set of car doors (21) mounted on the elevator car, with a configuration analogous to the set of landing doors (19) and intended to come face-to-face with the latter, within the space (9?), at each building storey landing, in said space of 125 mm between the car frame (13) and the landing access opening frame (3).