The adjustable seat device (10) comprises:-At least one linear support configured to support a horizontal surface of the edge of the swimming pool, and at least one linear support configured to support the inner wall of the swimming pool, a base (28), and a base (28),-Sit on the benchmark (36.0)The end has an end, which has a first seat slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slide slideThe end has a second base slide (31), which is configured to slide along a linear support, and has a locking device (32) for the second base slide (32), which is located at the position of the linear support (35), and the two base sliders (32) jointly support the base through a pivot connection (35) and are connected with each other. The seat slide member slides independently along the 20 linear support members, the joint sliding of the seat sliding piece adjusts the height of the seat, and the corresponding sliding of the seat sliding piece adjusts at least one gap between the seat sliding piece and the linear support member.Le dispositif (10) d'assise réglable comporte: - un support linéaire (38), - au moins un moyen d'appui supérieur du support linéaire configuré pour prendre appui sur une surface horizontale en bordure d'une piscine et au moins un moyen d'appui inférieur du support linéaire configuré pour prendre appui sur une paroi interne de la piscine
