PURPOSE: To set a ferrule pitch to a diameter of an optical fiber critical bend or below by inserting and fixing each one end of two optical fibers into ferrules, respectively, in a housing, and inverting and connecting to each other end through one light deflecting element.

CONSTITUTION: Two optical fibers 25, 26 are contained in a housing 20, and each one end is inserted and fixed into ferrules 21, 22. Also, each other end of the optical fibers 25, 26 is connected in a connecting part C. Moreover, each end face of the optical fibers 25, 26 is chamfered in the opposite direction to each other at an angle of 45 degrees to the optical axis, and these inclined end faces are coated with light total reflecting films 28, 29, respectively. In this way, light O sent to an optical fiber 25a is reflected and polarized by the light reflecting films 28, 29, and made incident to an incident end face of an optical fiber core 26a. In this way, it is unnecessary to bend the optical fibers 25, 26 by a small bending radius, and a pitch between the ferrules can be set to a diameter of an optical fiber critical bend or below.