To provide a mold for forming a hydraulic inorganic formed body, the dehydrating properties on the upper mold side of which is favorable, the hydraulic inorganic formed body obtained with which is wholly homogeneous and the pouring port of a hydraulic inorganic material of which is hard to be clogged.

This forming mold 1 is a mold, which consists of an upper mold 2 equipped with a pouring tube 21, through which a hydraulic inorganic material 10 is fed and, at the same time, provided with a large number of drainage holes 42 on the molding surface thereof, and a lower mold 3, on the molding surface of which a large number of drainage holes 41 are provided, and in which the hydraulic inorganic material 10 is forced through the pouring tube 21 between two filtering materials 91 and 92, both are made of an extensible material and hangingly provided in a mold formed by clamping the upper mold 2 and the lower mold 3, so as to be shaped by developing the dehydration through the drainage holes 41 and 42 of the upper mold 2 and of the lower mold 3. In addition, the upper side filtering material 92 is hangingly provided by being fixed to the peripheral edge of the pouring tube 21 and to the peripheral edge of the upper mold 2.