Optical connector and plug

To provide an optical connector that has small number of components and a simple configuration, and can reduce production costs, improve productivity, and reduce the size thereof. In this optical connector (10), a first connector (110) has: a first connector housing (120) formed in a tubular body shape and having an accommodation section therein; a spacer (400) which is in sliding contact with an inner surface of the accommodation section of the first connector housing and in which a first ferrule (130) is slidably provided; a biasing member (300) which biases the spacer toward a second connector (210) side; and a stopper (500) fixed to a rear section of the first connector housing on the side opposite from the second connector, wherein a recessed groove through which a first optical cable A passes is formed in the spacer and the stopper, and the biasing member has, between the spacer and the stopper, a pair of coil springs provided on both sides of the first optical cable A.