A second mold is placed on a planar surface of a first mold having the planar surface, thereby forming a first mold cavity. The first mold cavity is filled with a first material slurry which contains a first material powder, a dispersant, and a gelling agent, so as to mold the slurry, and the molded slurry is caused to set, thereby forming a first molded part on the planar surface of the first mold. A third mold is placed on the planar surface of the first mold from which the second mold is removed and on which the first molded part is formed, thereby forming a second mold cavity. The second mold cavity is filled with a second material slurry which contains a second material powder different in material from the first material powder, a dispersant, and a gelling agent, so as to mold the slurry in such a manner that the slurry comes into contact with the first molded part, and the molded slurry is caused to set, thereby forming a second molded part on the planar surface of the first mold. By this procedure, there can be provided a molded body in which two types of molded parts of different materials are bonded together and which exhibits high bonding strength between the bonding surfaces of the two types of molded parts.