To provide a method for molding a food sealing container of intermeshed type made of additive-free polyethylene without possibility of elution of an environmental hormone.

A cover 1 having flexibility is injection molded of an additive- free low density polyethylene. A container body 10 having rigidity is molded of an additive-free high density polyethylene by holding a resin temperature of the melting high density polyethylene in a molding machine at a lower temperature than a standard value of a resin temperature in the case of molding polyethylene of an additive-filled injection molding grate and setting a pressing force of the melted polyethylene in the mold from the machine to a higher value than that of the case of molding the polyethylene of the additive-filled grate.