To provide a manufacturing method for a ferrule for forming a ferrule excellent in productivity, dimensional precision and a surface characteristic.

A thin wire is penetrated longitudinally through a cavity 29 of an optical fiber ferrule 1 wherein one part of an optical fiber ferrule barrel part cavity portion is composed of a seamless cylinder formed inside a die body, wherein at least one end face of the cavity 29 is constituted of a slide core 25, and wherein a flange part 10 is composed of by the slide core 25, or by the slide core 25 and a movable die, a molten thermoplastic resin is extruded to mold the ferrule 1 inside the cavity 29, then the slide core 25 is opened, and a ferrule molding is moved by a prescribed distance along the thin wire direction to be taken out of the die, in this optical fiber ferrule manufacturing method.