Light transmissive body and method for manufacturing same

The objective of the present invention is to provide a light transmissive body in which excellent durability, abrasion resistance, and lubricity as well as excellent adhesiveness are achieved. According to an embodiment of the present invention, the light transmissive body is provided and includes: a fiber line having a core composed of a first glass and a cladding that is composed of a second glass and coats an outer peripheral surface of the core; and a coating layer that coats the outer peripheral surface of the cladding. The coating layer includes a plurality of nonionic surfactant molecules each of which is hydrogen-bonded to the cladding. 本发明的目的在于提供种兼顾优异的耐久性、耐磨损性和润滑性与优异的粘接性的光传输体。根据实施方式，提供种光传输体，其包含纤维线材和被覆层，纤维线材由芯和包层构成，芯由第1玻璃构成，包层由第2玻璃构成且被覆芯的外周面，被覆层被覆包层的外周面，被覆层由多个非离子型表面活性剂分子构成，各个非离子型表面活性剂分子与包层进行氢键键合。