An optical connector includes: a board having a first signal-light propagation medium with a first optical signal end; and a chassis disposed on the board. The chassis includes: an insertion-and-removal section having an insertion-hole forming wall that defines an insertion hole, into which a second optical signal end of a second signal-light propagation medium is removably inserted. The wall has: a support surface. supporting a side face portion of the second signal end; and an abutting surface on which abuts a front-end portion of the second signal end. The chassis further includes an optical connection section provided with a through-hole forming wall defining a through hole optically connecting the first signal end with the inserted second signal. The optical connector further includes a biasing member that positions the second signal end inserted into the insertion-and-removal section by biasing the second signal end to both the abutting and support surfaces.