To provide a method for producing a refractory usable as a wide thin plate useful for a sagger for baking a ceramic, one for electronic parts, a baking setter (a tool material for roller hearth kiln baking) for tile, ferrite compact, etc., capable of adjusting a packing density so as to have a specific porosity, namely bulk density.

This method for producing a refractory comprising molding a body containing a gas curable resin into a fixed shape, then hardening the compact in an atmosphere of the gas capable of curing the compact or molding the body containing the gas curable resin in a mold of a shape capable of curing the gas curable resin and introducing the gas capable of curing the gas-curable resin into the mold to cure the compact 4.