The invention provides a laminated optical waveguide film in which a plurality of waveguide cores are formed, and a plurality of end surfaces at which the waveguide cores are exposed are formed, wherein, among the plurality of end surfaces, a first end surface has waveguide core end surfaces laminated in a thickness direction, and a second end surface has waveguide core end surfaces arranged in parallel. The invention also provides a method for producing the optical guide film, and an optical module using the optical guide film.

 
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