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 . <EOS>