To provide a thermal radiation material whose surface temperature can be held to be high, and which has excellent corrosion resistance as well.

In a food broiler 1, bars 12 are hung over supporting members 11 on both sides, and basted eels 5 are arranged on the bars 12 via spits 51. In the food broiler 1, food heating plates 3 are heated by a heat source 2, and heat is conducted from the food heating plates 3 to the eels 5, and the eels 5 are broiled and cooked. The food heating plates 3 are obtained by subjecting the surface of a nickel material containing ≥95% nickel to diffusion treatment of Al.