An optical connector comprising: a lens configured to convert a light signal from a light transmission path or a light source to a converted light signal of a predetermined divergence angle and emit the converted light signal; and a housing to which the lens is fixed and coupled to a connector at a reception side of the light signal, wherein: the predetermined divergence angle is an angle at which an amount of light in a predetermined region at a position away from the lens by a predetermined distance is equal to or smaller than a preset amount of light; the predetermined divergence angle is an angle at which an amount of decrease in an amount of light in a light signal received by the connector at reception side is equal to or smaller than a preset amount of decrease in an amount of light, within an attachment tolerance range when the housing is coupled to the connector at reception side; the predetermined divergence angle is 10° or more; the predetermined divergence angle is 20° or less; and the lens converts the light signal to a light signal that has the predetermined divergence angle at a position away from the lens by the predetermined distance, by collecting the light signal to a position closer than the predetermined distance away from the lens, wherein the light transmission path or the light source has an emission surface at a position different from the focal point position of the lens . a lens configured to convert a light signal from a light transmission path or a light source to a converted light signal of a predetermined divergence angle and emit the converted light signal; and a housing to which the lens is fixed and coupled to a connector at a reception side of the light signal, wherein: the predetermined divergence angle is an angle at which an amount of light in a predetermined region at a position away from the lens by a predetermined distance is equal to or smaller than a preset amount of light; the predetermined divergence angle is an angle at which an amount of decrease in an amount of light in a light signal received by the connector at reception side is equal to or smaller than a preset amount of decrease in an amount of light, within an attachment tolerance range when the housing is coupled to the connector at reception side; the predetermined divergence angle is 10° or more; the predetermined divergence angle is 20° or less; and the lens converts the light signal to a light signal that has the predetermined divergence angle at a position away from the lens by the predetermined distance, by collecting the light signal to a position closer than the predetermined distance away from the lens, wherein the light transmission path or the light source has an emission surface at a position different from the focal point position of the lens . the predetermined divergence angle is an angle at which an amount of light in a predetermined region at a position away from the lens by a predetermined distance is equal to or smaller than a preset amount of light; the predetermined divergence angle is an angle at which an amount of decrease in an amount of light in a light signal received by the connector at reception side is equal to or smaller than a preset amount of decrease in an amount of light, within an attachment tolerance range when the housing is coupled to the connector at reception side; the predetermined divergence angle is 10° or more; the predetermined divergence angle is 20° or less; and the lens converts the light signal to a light signal that has the predetermined divergence angle at a position away from the lens by the predetermined distance, by collecting the light signal to a position closer than the predetermined distance away from the lens, wherein the light transmission path or the light source has an emission surface at a position different from the focal point position of the lens . <EOS>