To improve heating efficiency by a method wherein floor heating panels each equipped with a floor heating heater at the inside and a connecting part for a service wire at its one end are arranged side by side to form a floor heating panel body, and a wiring panel is provided at the end of the panel body.

A tieplate-like floor heating panel 2 is formed with an indent subsiding toward the downside provided at its one end and a service wire connecting part 1 for housing a connector and a plug provided at the inside of the indent. Then, a floor heating panel body 3 is formed with a plurality of paired floor heating panels 2 each butted against each other at their other ends arranged side by side. Wiring panels 4 are arranged at the side of the floor heating panels 2 so that the floor heating panel body 3 is sided by the wiring panels, and the service wire connecting parts 1 are connected with one another in series with a wiring 8 through the wiring panels 4. Therefore, an extended continuous heating surface can be formed efficiently without sparing unheated areas.