Turbomachine having a main flow path which is bordered by a radially inner main flow path boundary and a radially outer main flow path boundary and which has a main flow direction, wherein blades of a rotor row or stator row are arranged in the main flow path, wherein - each of the blades is formed with a substantially convex suction side and a substantially concave pressure side, and also with a leading edge, onto which the flow flows in, and a trailing edge, from which the flow flows out, - centrally between the radially inner main flow path boundary and the radially outer main flow path boundary of the main flow path, there is a mean meridian streamline of a meridian flow, the course of which corresponds to a connection of the central points of circles inscribed by the main flow path, and, within the main flow path, there is a set of straight lines (G(i)), the members of which are in each case perpendicular to the mean meridian streamline and end at the main flow path boundaries (N, G), wherein further meridian streamlines (SL(i)) are defined by the connection of points with respectively equal percentage division of the straight lines (G(i)) between the main flow path boundaries (N, G), and - each of the blades has at least one set-back contour portion which is provided on at least one of the sides, comprising the suction side and the pressure side, of the blade, wherein the set-back contour portion extends over at least a part of the profile depth of each of the blades in the direction of the meridian streamlines (SL(i)) and of the profile height of the blade perpendicular to the meridian streamlines (SL(i)), wherein the set-back contour portion of each of the blades is provided in an edge region, which is defined by the radially inner or radially outer 30% of the main flow path width, in the vicinity of a fixed blade end and forms a ramp which, extending in the main flow direction, leads from a blade contour point within the main flow path toward the inner or outer main flow path boundary, characterized in that the set-back contour portion comprises a shoulder edge, a contour corner and a flank surface provided between the shoulder edge and the contour corner, wherein the width of the flank surface increases continuously along the blade profile depth with the flow direction and accordingly ends with a maximum value. - each of the blades is formed with a substantially convex suction side and a substantially concave pressure side, and also with a leading edge, onto which the flow flows in, and a trailing edge, from which the flow flows out, - centrally between the radially inner main flow path boundary and the radially outer main flow path boundary of the main flow path, there is a mean meridian streamline of a meridian flow, the course of which corresponds to a connection of the central points of circles inscribed by the main flow path, and, within the main flow path, there is a set of straight lines (G(i)), the members of which are in each case perpendicular to the mean meridian streamline and end at the main flow path boundaries (N, G), wherein further meridian streamlines (SL(i)) are defined by the connection of points with respectively equal percentage division of the straight lines (G(i)) between the main flow path boundaries (N, G), and - each of the blades has at least one set-back contour portion which is provided on at least one of the sides, comprising the suction side and the pressure side, of the blade, wherein the set-back contour portion extends over at least a part of the profile depth of each of the blades in the direction of the meridian streamlines (SL(i)) and of the profile height of the blade perpendicular to the meridian streamlines (SL(i)), wherein the set-back contour portion of each of the blades is provided in an edge region, which is defined by the radially inner or radially outer 30% of the main flow path width, in the vicinity of a fixed blade end and forms a ramp which, extending in the main flow direction, leads from a blade contour point within the main flow path toward the inner or outer main flow path boundary, characterized in that the set-back contour portion comprises a shoulder edge, a contour corner and a flank surface provided between the shoulder edge and the contour corner, wherein the width of the flank surface increases continuously along the blade profile depth with the flow direction and accordingly ends with a maximum value.