Two-strip siding profile, designed for cladding of walls in particular on buildings, said profile comprising - a core made of a solid, foamed or laminated material and an outer face layer or decorative layer or a layer of paint or other thin decorative element serving as such, as well as - means for connecting and fastening in the form of various, mutually compatible endings shaped as transversal catches (13, 14, 20, 21) with projections (15, 16, 24, 25, 35, 36, 42, 43) and grooves (17, 18, 22, 23, 33, 34, 44, 45, 46, 47), wherein at one end the transversal catches (13, 14) extend beyond the main body of the profile and are directed towards the face layer of the profile and at the other end the transversal catches (20, 21) are facing in the direction opposite to the face layer, said profile further comprising - an upper and a lower strip (10, 10') separated by an inter-strip belt, wherein the inter-strip belt is a groove and divides the surface of the profile forming said two strips (10, 10'), wherein along the whole length of the profile, - the inside of the lower part of the lower strip includes a longitudinal L-shaped catch consisting of the longitudinal catch and a base of the catch, wherein the base connects the longitudinal catch with the core of the profile, and - the upper part of the upper strip includes a groove, the bottom of which is an assembly belt and a sub-assembly belt with a shape corresponding to the inter-strip belt and - the lower part of the upper strip includes on the inner side a longitudinal support protrusion corresponding in shape to the assembly belt, - wherein the transversal catches (13, 20) on the lower strip are not longer than the width of the strip between the inter-strip belt and the inner edge of the base of the longitudinal catch minus the width of the longitudinal catch, and - the transversal catches (14, 21) on the upper strip are not longer than the width of the upper strip between the sub-assembly belt and the inner edge of the inter-strip belt minus the width of the longitudinal support protrusion, and wherein additionally, each single transversal catch (13, 14, 20, 21) comprises from 0.6% to 30% of the length of the profile but not less than 6 mm and not more than 200 mm, and wherein the projections (15, 16, 24, 25) comprise not more than 50% of the width of the catch (13, 14, 20, 21) but not less than 3 mm. - a core made of a solid, foamed or laminated material and an outer face layer or decorative layer or a layer of paint or other thin decorative element serving as such, as well as - means for connecting and fastening in the form of various, mutually compatible endings shaped as transversal catches (13, 14, 20, 21) with projections (15, 16, 24, 25, 35, 36, 42, 43) and grooves (17, 18, 22, 23, 33, 34, 44, 45, 46, 47), - an upper and a lower strip (10, 10') separated by an inter-strip belt, wherein the inter-strip belt is a groove and divides the surface of the profile forming said two strips (10, 10'), wherein along the whole length of the profile, - the inside of the lower part of the lower strip includes a longitudinal L-shaped catch consisting of the longitudinal catch and a base of the catch, wherein the base connects the longitudinal catch with the core of the profile, and - the upper part of the upper strip includes a groove, the bottom of which is an assembly belt and a sub-assembly belt with a shape corresponding to the inter-strip belt and - the lower part of the upper strip includes on the inner side a longitudinal support protrusion corresponding in shape to the assembly belt, - wherein the transversal catches (13, 20) on the lower strip are not longer than the width of the strip between the inter-strip belt and the inner edge of the base of the longitudinal catch minus the width of the longitudinal catch, and - the transversal catches (14, 21) on the upper strip are not longer than the width of the upper strip between the sub-assembly belt and the inner edge of the inter-strip belt minus the width of the longitudinal support protrusion, and