| abstract |
To provide a material for producing an optical waveguide having excellent bending durability, twisting durability, and sliding durability, and to provide an optical waveguide having the above characteristics. An optical waveguide core-forming resin composition containing (A) a base polymer, (B) a monofunctional epoxy (meth) acrylate, and (C) a photoradical polymerization initiator, and the core-forming resin. A resin film for forming a core part using a composition, and an optical waveguide in which a core part is formed using the resin composition for forming a core part or the resin film for forming a core part. [Selection] Figure 1 |