Optical waveguide, method for producing optical waveguide, optical waveguide module, method for producing optical waveguide module, and electronic apparatus

The objective of the present invention is to provide: an optical waveguide that has low optical coupling loss when optically coupled with an optical element and that is capable of high-quality optical communication; a method for producing the optical waveguide that can efficiently produce the optical waveguide; an optical waveguide module that is provided with the optical waveguide and that is capable of high-quality optical communication; a method for producing the optical waveguide module that can efficiently produce the optical waveguide module; and an electronic apparatus. The optical waveguide is characterized by having: a core section; a cladding section provided in a manner so as to cover the side surface of the core section; an optical path conversion section that is provided partway along or on a line extended from the core section and that converts the optical path of the core section to the outside of the cladding section; and a lens that is provided to at least the site of the surface of the cladding section that is optically connected via the optical path conversion section to the core section, said lens having being formed by means of causing the local protrusion or depression of the surface.