To provide a ceramic molded body manufacturing device of simple constitution provided with comparative high dimension accuracy.

An agitation defoaming machine 25, a first booster 28, a cylindrical injection nozzle 7 provided in a cylindrical gypsum mold 8 to be lifted and lowered and used combinedly as a core and a second booster 18 are connected all together continuously in the loop shape. A slurry blowing hole 12 is formed on the lower end of the injection nozzle 7. A slurry discharge outlet 11 is formed in the bottom of the gypsum mold 8, and discharged slurry is recovered again into the agitation defoaming machine 25 by the second booster 18.