An electric heating device for heating a fluid flow, - comprising a substantially rectangular and flat heating element block, which extends at right angles to an axial direction and through which the fluid flow can flow in an axial manner, - comprising a substantially rectangular frame for securing the heating element block, which is inserted into the frame, with a heating element block underside first, - wherein the frame has a frame underside and a frame upper side, - wherein the frame underside is embodied as edge-side support for the heating element block underside, - wherein the frame has an inner side, which faces the heating element block, and an outer side, which faces away from the heating element block, - wherein the frame has two longitudinal sections and a transverse section, - wherein the two longitudinal sections extend substantially perpendicular to the transverse section, - wherein, on its inner side, the frame has at least two detent elements for securing the heating element block, - wherein the at least two detent elements each have a detent nose, which protrudes radially inward beyond the remaining detent element, - wherein the heating element block has two outer contours, which run along the two longitudinal sections, - wherein the two outer contours have at least two detent contours, - wherein the respective detent nose engages with the respective detent contour, characterized in that the respective detent nose is arranged between a block upper side plane, which extends parallel to a heating element block upper side, and a block underside plane, which extends parallel to the heating element block underside. - comprising a substantially rectangular and flat heating element block, which extends at right angles to an axial direction and through which the fluid flow can flow in an axial manner, - comprising a substantially rectangular frame for securing the heating element block, which is inserted into the frame, with a heating element block underside first, - wherein the frame has a frame underside and a frame upper side, - wherein the frame underside is embodied as edge-side support for the heating element block underside, - wherein the frame has an inner side, which faces the heating element block, and an outer side, which faces away from the heating element block, - wherein the frame has two longitudinal sections and a transverse section, - wherein the two longitudinal sections extend substantially perpendicular to the transverse section, - wherein, on its inner side, the frame has at least two detent elements for securing the heating element block, - wherein the at least two detent elements each have a detent nose, which protrudes radially inward beyond the remaining detent element, - wherein the heating element block has two outer contours, which run along the two longitudinal sections, - wherein the two outer contours have at least two detent contours, - wherein the respective detent nose engages with the respective detent contour, characterized in that the respective detent nose is arranged between a block upper side plane, which extends parallel to a heating element block upper side, and a block underside plane, which extends parallel to the heating element block underside.