To provide a mold structure for a cement mortar molding which can satisfactorily mold with small air residue.

This mold structure for a cement mortar molding comprises a vertically movable upper mold 11 having a dehydrating function, an intermediate mold 12 installed under the mold 11, a form 13 brought into contact with the periphery of the mold 12 to be vertically slidable, and a block 14 having water permeability to communicate with the exterior of the form 13 and embedded in the sliding surface 13a of the form 12 with the mold 12.