Insertion profile rail as a horizontal support and holding element in a mounting system for an exterior cladding, preferably plate-shaped, facade elements, in particular framed photovoltaic modules and solar-thermal collectors, for anchoring to a building structure, with - a mounting plate extending in a longitudinal direction, the cross-section of which extends in a width coordinate and a height coordinate, when viewed in the longitudinal direction, - a cantilever plate with cantilevered surfaces (121, 122) arranged opposite one another, wherein the cantilever plate is arranged vertically, preferably centrally, with a first end on the mounting plate, wherein the cantilever surfaces (121, 122) are arranged at a specific distance to each other and define a recess for receiving a connection element for connection to a respective adjacent insertion profile rail which extends in the longitudinal direction of the cantilevers, - a support frame for an upper facade element on an upper of the cantilever surfaces, wherein the retaining frame has the shape of a recess with respect to the cross-section of the mounting plate and is terminated at a second end of the cantilever plate by a short holding web which extends in the height coordinate, - a retaining frame for a lower facade element on a lower of the cantilever surfaces, which has the shape of a recess with respect to the cross section of the mounting plate, and is terminated by a long retaining web at the second end of the cantilever panel, wherein the long holding web extends, viewed from the respective cantilever surface (121, 122) of the cantilever, over a longer length as the short holding web, wherein the support frame and the retaining frame are substantially U-shaped, wherein the support frame is formed by a top cantilever surface section of the upper cantilever surface as base surface and an upper back web which is arranged perpendicular to the cantilever plate and the short holding web as legs, wherein the retaining frame is formed by a cantilever surface section of the lower cantilever surface as base surface and a lower back web which is arranged vertically on the cantilever plate and the long holding web as legs, characterized in that the support frame and the retaining frame are each arranged at a predetermined distance from the mounting plate on the cantilever plate, and that at least the short holding web on the visible side is provided with a convex curvature. - a mounting plate extending in a longitudinal direction, the cross-section of which extends in a width coordinate and a height coordinate, when viewed in the longitudinal direction, - a cantilever plate with cantilevered surfaces (121, 122) arranged opposite one another, wherein the cantilever plate is arranged vertically, preferably centrally, with a first end on the mounting plate, wherein the cantilever surfaces (121, 122) are arranged at a specific distance to each other and define a recess for receiving a connection element for connection to a respective adjacent insertion profile rail which extends in the longitudinal direction of the cantilevers, - a support frame for an upper facade element on an upper of the cantilever surfaces, wherein the retaining frame has the shape of a recess with respect to the cross-section of the mounting plate and is terminated at a second end of the cantilever plate by a short holding web which extends in the height coordinate, - a retaining frame for a lower facade element on a lower of the cantilever surfaces, which has the shape of a recess with respect to the cross section of the mounting plate, and is terminated by a long retaining web at the second end of the cantilever panel, wherein the long holding web extends, viewed from the respective cantilever surface (121, 122) of the cantilever, over a longer length as the short holding web, wherein the support frame and the retaining frame are substantially U-shaped,