Disclosed herein is an optical connection. In the present invention, an element wire is removably fastened to the optical connector by tightening a main wire connection member using a tightening member from a state in which a plug, a main wire aligning member, a spring, a fastening member, the main wire connection member and the tightening member are previously assembled together. Consequently, only a related optical line need be repaired or replaced with another one, so that the optical line connection work is markedly simplified and can be performed conveniently. Furthermore, there is an advantage of efficient reuse of components.