Blade wheel, in particular compressor wheel or turbine wheel, preferably for a gas compressor or turbocharger, with a base body that has a flow side (32.3) and a rear side (32.1) opposite the flow side (32.3), wherein a flow surface is formed on the flow side (32.3), wherein blades project from the flow surface, wherein the blades are connected integrally to the flow surface via a connecting section, wherein an axis of rotation of the blade wheel extends between the flow side and the rear side (32.3, 32.1), wherein a flow channel with a channel bottom (34.1) is formed between at least two neighboring blades, wherein the blades extend longitudinally in the direction of the flow channel longitudinal direction and each have a pressure side (35.3) and a suction side (35.2) opposite the pressure side, wherein one of the neighboring blades delimits the flow channel with its pressure side (35.3) and the other of the neighboring blades delimits the flow channel with its suction side (35.2), and wherein the connecting section forms a throat-shaped surface contour (36.1) extending along the connecting section in the transition from the channel bottom (34.1) to the pressure side (35.3) of the one blade and/or in the transition from the channel bottom (34.1) to the suction side (35.2) of the neighboring blade, wherein, in a cross section through at least one of the blades transverse to the longitudinal extension of the blade, the surface contour (36.1), in the cross-sectional plane, is designed such that it merges into the suction side (35.2) and the channel bottom (34.1) at connection points (P, Q) into the suction side (35.2) and the channel bottom (34.1) continuously differentiably and/or wherein the surface contour (36.1) is designed, in the cross-sectional plane, such that it merges into the pressure side (35.3) and the channel bottom (34.1) at connection points (P, Q) continuously differentiable, wherein the surface contour (36.1), in the cross-sectional plane, has, at least in some areas, the shape of a conical section or, at least in some areas, the shape of a linear combination of conical sections, wherein the surface contour (36.1) forms a continuous surface, which has, at least in some areas, an ellipse, a parabola or a hyperbola, wherein two tangents (T1, T2) passing through the connection points (P, Q) in this cross-sectional plane form an intersection point, characterized in that the surface contour (36.1) forms an apex between the connection points (P, Q), that a virtual connecting line is formed between the connection points (P, Q), that a first distance line formed perpendicular to the virtual connecting line and passing through the apex forms a first distance value between the apex and the virtual connecting line, that a second distance line formed perpendicular to the virtual connecting line and passing through the intersection point of the tangents (T1, T2) forms a second distance value between the intersection point and the virtual connecting line, and that a geometry parameter, which is determined by the ratio of the first distance value to the second distance value VS / VD is selected in the range from 0.3 to 0.7. in that the surface contour (36.1) forms an apex between the connection points (P, Q), that a virtual connecting line is formed between the connection points (P, Q), that a first distance line formed perpendicular to the virtual connecting line and passing through the apex forms a first distance value between the apex and the virtual connecting line, that a second distance line formed perpendicular to the virtual connecting line and passing through the intersection point of the tangents (T1, T2) forms a second distance value between the intersection point and the virtual connecting line, and that a geometry parameter, which is determined by the ratio of the first distance value to the second distance value VS / VD is selected in the range from 0.3 to 0.7.