OPTICAL MODULE, AND OPTICAL SYSTEM

PROBLEM TO BE SOLVED: To provide an optical module and an optical system capable of forming a two-way optical receiving/transmitting line using the same optical wiring form without using any special component.SOLUTION: An optical module 2A has a plurality of single-fiber optical adaptors 7A, a multi-fiber optical adaptor 8A, a plurality of single-fiber optical connectors 9A fitted to each of the single-fiber optical adaptors 7A, a multi-fiber optical connector 10A fitted to the multi-fiber optical adaptor 8A, and a plurality of optical fibers 11A to connect each of the single-fiber optical connectors 9A to the multi-fiber optical connector 10A. The wiring of the optical fibers 11A is formed so as to connect two single-fiber optical connectors 9A fitted in the single-fiber optical adaptors 7A adjacent to each other to fiber holes 13 in the upper stage and the lower stage of the same column in the multi-fiber optical connector 10A.