An optical connector includes: an engaging member having a pair of elastic pieces that can be engaged with locking portions on both sides of a receiving-side optical connector; and a movable tubular housing externally fitted to the engaging member, wherein the pair of elastic pieces approaches each other by an engagement with the locking portions on both sides of the receiving-side optical connector, and thereby, the housing becomes movable forward with respect to the portion of the engaging member that engages with the locking portions, and wherein an engagement state between the elastic pieces and the locking portions on both sides of the receiving-side optical connector is maintained as the pair of elastic pieces abuts an inside of the housing thereby regulating a movement in a direction of being separated from each other when the housing has moved forward with respect to the engaging member.