An object is to provide an optical transmission element which is excellent in all respects of durability, abrasion resistance, lubricity, and adhesiveness. According to an embodiment, there is provided an optical transmission element comprising: a fiber including a core made of a first glass and a cladding made of a second glass and covering an outer periphery of the core and a covering layer covering an outer periphery of the cladding and including a plurality of nonionic surfactant molecules wherein each of the nonionic surfactant molecules is hydrogen-bonded to the cladding.
