An optical connector is provided. The optical connector includes: an optical fiber line fixing block including an insertion groove in which an end portion of an optical fiber line is inserted; and a submount including first guide-walls determining a position of the optical fiber line fixing block and second guide-walls determining a position of an optical device to be connected to the optical fiber line, wherein the optical fiber line fixing block and the optical device are automatically aligned by the first guide-walls and the second guide-walls.