A structure for sliding architectural elements, comprising: - a in-wall frame, which is substantially shaped like a parallelepiped and comprises a first vertical main face and a second vertical main face which are mutually parallel and opposite, an open passage face which is vertical and perpendicular to said main faces (11, 12), a horizontal upper face and a horizontal lower base, at least said main faces comprising a plurality of vertical posts (20, 30, 23, 24) adapted to connect said upper face to said lower base, - a sliding body, which can slide within said in-wall frame and through said open passage face, parallel to said first main face and said second main face along a horizontal sliding axis, between a retracted position, in which it is mostly included inside said in-wall frame, and an extracted position, in which it mostly protrudes outside of said in-wall frame from said open face, characterized in that said vertical posts (22, 30, 23, 24) comprise: - at least one first asymmetrical vertical post, which can be fixed detachably to said first main face of the in-wall frame, provided with a main planar wall and a protruding tab which protrudes transversely with respect to said main planar wall, - at least one first symmetrical vertical post, which is substantially planar and can be fixed detachably on said first main face of the in-wall frame; said first main face of the in-wall frame being configurable at least: in a first configuration for plasterboard, in which said first asymmetrical vertical post is fixed on said first main face along one edge of said open face, with said protruding tab which projects toward the outside of said in-wall frame, and wherein said first symmetrical vertical post is fixed on said main face at one end of said main face which is distal with respect to said open face, so that said main face is configured to accommodate a panel made of plasterboard or the like, and in a configuration for boiserie, in which said asymmetrical vertical post is fixed on said main face, at the end of said first main face that is distal with respect to said open face, with said protruding tab which projects toward said sliding axis X, so that said main face is configured to accommodate a panel of boiserie or the like. - a in-wall frame, which is substantially shaped like a parallelepiped and comprises a first vertical main face and a second vertical main face which are mutually parallel and opposite, an open passage face which is vertical and perpendicular to said main faces (11, 12), a horizontal upper face and a horizontal lower base, at least said main faces comprising a plurality of vertical posts (20, 30, 23, 24) adapted to connect said upper face to said lower base, - a sliding body, which can slide within said in-wall frame and through said open passage face, parallel to said first main face and said second main face along a horizontal sliding axis, between a retracted position, in which it is mostly included inside said in-wall frame, and an extracted position, in which it mostly protrudes outside of said in-wall frame from said open face, characterized in that said vertical posts (22, 30, 23, 24) comprise: - at least one first asymmetrical vertical post, which can be fixed detachably to said first main face of the in-wall frame, provided with a main planar wall and a protruding tab which protrudes transversely with respect to said main planar wall, - at least one first symmetrical vertical post, which is substantially planar and can be fixed detachably on said first main face of the in-wall frame; said first main face of the in-wall frame being configurable at least: in a first configuration for plasterboard, in which said first asymmetrical vertical post is fixed on said first main face along one edge of said open face, with said protruding tab which projects toward the outside of said in-wall frame, and wherein said first symmetrical vertical post is fixed on said main face at one end of said main face which is distal with respect to said open face, so that said main face is configured to accommodate a panel made of plasterboard or the like, and in a configuration for boiserie, in which said asymmetrical vertical post is fixed on said main face, at the end of said first main face that is distal with respect to said open face, with said protruding tab which projects toward said sliding axis X, so that said main face is configured to accommodate a panel of boiserie or the like. in a first configuration for plasterboard, in which said first asymmetrical vertical post is fixed on said first main face along one edge of said open face, with said protruding tab which projects toward the outside of said in-wall frame, and wherein said first symmetrical vertical post is fixed on said main face at one end of said main face which is distal with respect to said open face, so that said main face is configured to accommodate a panel made of plasterboard or the like, and in a configuration for boiserie, in which said asymmetrical vertical post is fixed on said main face, at the end of said first main face that is distal with respect to said open face, with said protruding tab which projects toward said sliding axis X, so that said main face is configured to accommodate a panel of boiserie or the like.