To provide a sheet-like surface heating body, very thin, rich in flexibility, excellent in safety, capable of being fixed by nailing, and suitable for floor heating.

In a sheet-like surface heating body 10, a current circuit equipped with a conductive trunk line 2 and conductive branch lines 3A, 3B made by a printing means, and heating surfaces 4 for generating heat by passing a current through the current circuit, are disposed on an under surface of a front side insulating film 1, a back-side insulating film 5 is disposed on the back side of the heating surfaces 4 with a protection film 9 interposed therebetween, then the front side insulating film 1, the protection film 9, and the back-side insulating film 5 are unified by sticking them together in peripheral parts outside the current circuit, and nailing allowing zones are provided outside the current circuit.