The invention relates to a heat exchanger plate (106) having first surface portions (210) located along first plate edges (220) and comprising first contacting regions (214), and second surface portions (212) located along second plate edges (222). The first surface portions (210) are bent to a first side yielding a first partial fluid channel (230), and the second surface portions (212) are bent to a second side yielding a second partial fluid channel(232). The first contacting regions (214) define a plane (S). The heat exchanger plate (106) has corner surface portions (224) comprising first corner edge portions (226) and second corner edge portions (228). At least two corner surface portions (224) are bent inward with respect to the first partial fluid channel (230) such that their first corner edge portions (226) are in the plane (S), while their second corner edge portions (228) are perpendicular to the plane (S).