PURPOSE: To eliminate protrusion of a hollow plate into a room by forming a cutout through all parallel sheets except one parallel sheet, fusion-melting or adhering a flat platelike sheet or a flat plate sheet with an exist to couple a plurality of passages.

CONSTITUTION: A floor heating panel closes passages 30 at the end in a hollow plate body having substantially parallel square, elliptical or circular passages 30 with plastic such as polypropylene as a material, one cutout 50 for coupling the passages across the passages is formed at a part near the end, or a plurality of cutouts are formed in response to the number of the position of exit 70 and passages for coupling the passages 30 to close the cutout 50 by a flat plate or a flat plate provided with the exit 70, and protruding exit 70 is provided only one side of a hollow plate to provide a floor heating panel in which no protrusion is formed on one side surface of the hollow plate.