The invention concerns a heating element for floor heating. The heating element comprises an insulation plate (1) made of a heat-insulation material and to be installed on a base as well as pipe fastenings (10) supported on the insulation plate (1). The pipe fastenings are provided with installation slots (14) for the heating pipes (20) to keep the heating pipes (20) in their positions when the top layer to be applied onto insulation plate (1) and the heating pipes (20) is cast. Into the insulation plate (1), form-cut grooves (4) provided with back-off cutting have been formed, and, onto the lower end of the pipe fastenings (10), flange parts (12) have been formed which correspond to the shape of the grooves (4) and which can be pushed into the grooves (4), so that the pipe fastenings (10) can be shifted in the grooves (4) to the desired locations for the purpose of installation of the heating pipes (20) in the installation slots (14).