PURPOSE: To provide the method for manufacturing the molded product having uniform natural-stone-like mottled pattern without deviation in the pattern, wherein cubic feel and profound feel are present, by providing a resin particle body at the deviated part of the surface layer part by a casting method in the manufacturing method of the molded product having the natural-stone shaped mottled pattern.

CONSTITUTION: A resin particle body comprising synthetic resin and inorganic filler is added into the mixture, liquid comprising polymerized unsaturating compound and inorganic powder at the weight ration of 100:50-200. The specific gravity of the resin particle body is larger than the specific gravity of the mixture by 0.1 or more, and the particle diameter of the resin particle body is 0.5-3.5mm. The weight ratio of the mixed liquid and the resin particle powder becomes 100:0.5-10. The polymerized composition formed in this way is injected into a mold. The resin particle undergoes sedimentation into the lower layer. The resin particle body is deviated in the surface layer part. Then, polymerization is performed. This is the manufacturing method of the product having these characteristics and the natural-stone shaped mottled pattern.