PROBLEM TO BE SOLVED: To appropriately set a generating region of an eddy current to match the shape of a surface to be heated and uniformly heat the whole of the surface to be heated in an electromagnetic induction heating device.
SOLUTION: An electromagnetic head portion 1 for generating alternating lines of magnetic force M to perform induction heating has a core 2 to be an orthogonal magnetic core and a heating coil 3 wound around its outer periphery. The core 2 has a facing portion 5 for facing a surface to be heated 4a of a conductive heating member 4 and an opposite portion 6 of its opposite side, the facing portion 5 formed in a shape in which the cross-sectional shape of the facing portion 5 is matched to the surface to be heated 4a. A line of magnetic force passing area Am and a path of the eddy current on the surface 4a are also matched to the heating shape of the surface 4a. Accordingly, it is possible to uniform the induction heating by applying the eddy current with less bias in the entire shape of the surface 4a and perform a variety of heating just as designed.