Heat exchanger plate provided with a heat transfer surface having a corrugated pattern with a plurality of ridges pressed to a first height level (a), and valleys pressed to a second basis surface level (b), and a plurality of separated guiding sections (13, 14, 15, 16) provided at a respective corner of the heat exchanger plate, and comprising a sealing gasket groove supported by protruding support knobs pressed in the heat exchanger plate and placed around a periphery of the heat exchanger plate, wherein each of the guiding sections comprises a first guiding surface (20, 30, 41, 51), a second guiding surface (21, 31, 42, 52), a third guiding surface (22, 32, 43, 53) and a fourth guiding surface (23, 33, 44, 54), wherein the first and second guiding surfaces are straight guiding surfaces perpendicular to each other, and the third and fourth guiding surfaces are straight guiding surfaces perpendicular to each other, the first and the third guiding surfaces, and the second and the fourth guiding surfaces, being parallel to each other, wherein first and third ones (13, 15) of the guiding sections have a first structure, and second and fourth ones (14, 16) of the guiding sections have a second structure, a rear side of the third guiding surfaces (53, 43, 32, 22) of the first, second, third and fourth guiding sections (13, 14, 15, 16) of the heat exchanger plate being arranged to bear on a front side of the first guiding surfaces (20, 30, 41, 51) of the fourth, third, second and first guiding sections (16, 15, 14, 13), respectively, of another heat exchanger plate comprising support knobs and guiding sections of the same type and turned upside down with respect to a transversal axis, and a rear side of the fourth guiding surfaces (54, 44, 33, 23) of the first, second, third and fourth guiding sections (13, 14, 15, 16) of the heat exchanger plate being arranged to bear on a front side of the second guiding surfaces (21, 31, 42, 52) of the fourth, third, second and first guiding sections (16, 15, 14, 13), respectively, of said another heat exchanger plate, for alignment of the heat exchanger plates, characterized in that the first structure is different from the second structure, each of the guiding sections further comprises a recessed corner surface (18, 28, 39, 49) being parallel to the second basis surface level (b) and having a pressing depth that is greater than the corrugated pattern of the heat transfer surface of the heat exchanger plate, the second basis surface level (b) being arranged between the first height level (a) and the recessed corner surfaces, the first and second guiding surfaces of the first and third guiding sections are comprised on different support knobs, the first and second guiding surfaces of the second guiding section are comprised on a common support knob and the first and second guiding surfaces of the fourth guiding section are comprised on a common support knob, the support knobs are pressed to the first height level (a), wherein the first and second guiding surfaces of the first, second, third and fourth guiding sections are positioned between the first height level (a) and the second basis surface level (b), the third and fourth guiding surfaces are positioned between the recessed corner surfaces and the second basis surface level (b), the first, second, third and fourth guiding surfaces extend with an angle α=5-30 degrees in relation to a direction perpendicular to a main extension plane of the heat exchanger plate, and a rear side of areas between the support knobs of the heat exchanger plate are arranged to bear on a front side of the support knobs of said another heat exchanger plate.