A joint of two floor panels (1, 1'), wherein each of the floor panels (1, 1') to be joined is in the form of a rectangular plate, comprising - an upper surface and a lower surface parallel to it, intended to be laid on the substrate, - two long edges (2, 2') of side surfaces (3, 3'), - two short edges (4, 4') of side surfaces (5, 5'), - a first vertical retaining assembly for the floor panels (1, 1') to be joined, in the form of an elastic insert placed between the floor panels (1, 1') to be joined, - a longitudinal coupling element shaped below the long edge of the side surface, wherein the longitudinal coupling element is parallel to the upper surface and extends horizontally beyond this upper surface, and furthermore, the longitudinal coupling element has a settling recess that couples with a downwardly extending projection of the adjacent floor panel and forms with it a horizontal retaining assembly of the floor panels (1, 1') to be joined, wherein the longitudinal coupling element has a bearing surface at its end which is remote from a bearing surface of the adjacent floor panel, and furthermore, a bearing projection is placed between the bearing surfaces (26,18) and forms a second vertical retaining assembly, and defines a lower dilatation gap, wherein the floor panel is joined by its long edge (2, 2') to the short edge (4, 4') of the adjacent floor panel by means of the said first vertical retaining assembly in the form of the elastic insert, placed via sliding in a guiding groove between the floor panels (1, 1') to be joined and extending from the side surface (5, 5') below the short edge and by means of said second vertical retaining assembly, placed below the first vertical retaining assembly, in the form of a bearing projection extending from the bearing surface, which the bearing projection is positioned partially in a groove formed in the bearing surface of the adjacent floor panel, the bearing projection has a height greater than the size of the lower dilatation gap and furthermore, the longitudinal coupling element has an upwardly extending vertical projection placed in a settling seat below the guiding groove of the elastic insert, characterized in that the bearing projection is an integral part of the floor panel and in that the groove is formed in a downwardly extending tongue of the adjacent floor panel. - an upper surface and a lower surface parallel to it, intended to be laid on the substrate, - two long edges (2, 2') of side surfaces (3, 3'), - two short edges (4, 4') of side surfaces (5, 5'), - a first vertical retaining assembly for the floor panels (1, 1') to be joined, in the form of an elastic insert placed between the floor panels (1, 1') to be joined, - a longitudinal coupling element shaped below the long edge of the side surface, wherein the longitudinal coupling element is parallel to the upper surface and extends horizontally beyond this upper surface, and furthermore, the longitudinal coupling element has a settling recess that couples with a downwardly extending projection of the adjacent floor panel and forms with it a horizontal retaining assembly of the floor panels (1, 1') to be joined, wherein the longitudinal coupling element has a bearing surface at its end which is remote from a bearing surface of the adjacent floor panel, and furthermore, a bearing projection is placed between the bearing surfaces (26,18) and forms a second vertical retaining assembly, and defines a lower dilatation gap, wherein the floor panel is joined by its long edge (2, 2') to the short edge (4, 4') of the adjacent floor panel by means of the said first vertical retaining assembly in the form of the elastic insert, placed via sliding in a guiding groove between the floor panels (1, 1') to be joined and extending from the side surface (5, 5') below the short edge and by means of said second vertical retaining assembly, placed below the first vertical retaining assembly, in the form of a bearing projection extending from the bearing surface, which the bearing projection is positioned partially in a groove formed in the bearing surface of the adjacent floor panel, the bearing projection has a height greater than the size of the lower dilatation gap and furthermore, the longitudinal coupling element has an upwardly extending vertical projection placed in a settling seat below the guiding groove of the elastic insert, characterized in that the bearing projection is an integral part of the floor panel and in that the groove is formed in a downwardly extending tongue of the adjacent floor panel.