Method of producing polymer optical waveguide

A method of producing a polymer optical waveguide, the method comprising:

• preparing a mold which is formed of a cured layer of a mold-forming curable resin, has a recess portion corresponding to a protrusion portion of a core of the optical waveguide and is provided with at least two through-holes at the recess portion;
• preparing a lower film base material comprising a lower film and a flat lower clad layer disposed on the lower film;
• introducing a core-forming curable resin into a first through-hole of the mold with which the lower film base material is brought into close contact, while sucking the recess portion of the mold from a second through-hole under reduced pressure to introduce the core-forming curable resin into the recess portion of the mold;
• curing the core-forming curable resin which has been introduced;
• removing the mold from the lower film base material;
• providing a clad-forming curable resin layer and a shape retentive member having a releasing layer formed thereon, the clad-forming curable resin layer being sandwiched between the lower film base material, on which the core is formed, and the shape retentive member;
• curing the clad-forming curable resin layer;
• and
• removing the shape retentive member from the clad-forming curable resin layer that has been cured.