PURPOSE: To provide a method for manufacturing a molded product with a multi-color pattern which prevents an intermediate color from generating as a result of the mixing of various stained gel coat resins, and further, enhances reproducibility and withholds a molding work for a long time.

CONSTITUTION: Various stained gel coat resins A1', A2', A3' are sprayed to the mold surface of a bottom force 43 in the form of liquid droplets using a spray gun 15, having jet orifices 16, which is capable of spraying various stained gel coat resins A1', A2', A3' individually. Thus a stained gel coat layer 46 with a multi-color pattern showing a clear color tone is created. Next, a lining layer 47 of a lining material is laminated on the stained gel coat layer 46, then a top force 44 is fitted into the bottom force 43 to manufacture a molded product having a multi-color pattern formed on the surface.