An injection molding machine is provided which prevents, when molding a molding product, a molded part not to be used as a product to be integrally molded together with a molding product to be a product from being uselessly produced and improves production efficiency.A nozzle receiving section 37 configured on a fixed mold 22 side of a cavity C formed of the fixed mold 22 and a movable mold 21 is made to slightly protrude to allow melted resin remaining at the ends of the nozzle receiving section 37 and nozzle 20 to be used as part of a molding product in the next molding cycle and it is thereby possible to prevent, when molding a thin flat molding product such as a compact disk and video disk, melted resin from being uselessly produced as a sprue.