Abstract: Relaxation chair comprising a flexible support element of the user jointly borne by a back-rest and a seat articulated on one another and mounted movably with sliding on a frame The relaxation chair of the present invention comprises a bearing structure of a flexible support element of the user's body arranged as a seat element and a back-rest element articulated with respect to one another. This bearing structure is guided in sliding on a frame by means of guide rails respectively associated to the seat and back-rest elements. The seat element is for example in the form of a U-shaped frame with a bottom free edge and lateral connecting bars. The seat element comprises an inflection between the bottom free edge and the corresponding articulation end so that the flexible support element is kept at a distance from the bearing structure, above the seat element, including when the user is installed in the chair.