An optical fiber ribbon comprising: at least three optical fibers arranged side by side; and a plurality of connection parts that each connect two adjacent ones of the optical fibers , the connection parts being provided intermittently in a length direction of the optical fibers and in a width direction of the optical fibers , wherein: a marking configured to be visually recognized for identifying the optical fiber ribbon is provided to each optical fiber ; a position, in the optical fiber's circumferential direction, of the marking provided to at least one of the optical fibers is different from a position, in the optical fiber's circumferential direction, of the marking provided to another optical fiber ; characterised in that positions of a plurality of markings formed respectively on the optical fibers match one another in the length direction of the optical fibers ; the plurality of markings provided respectively at different positions in the length direction of each optical fiber are formed at different positions in the circumferential direction; and a size of each marking of the plurality of markings ranges from 3 to 30 mm in the length direction of the optical fibers . at least three optical fibers arranged side by side; and a plurality of connection parts that each connect two adjacent ones of the optical fibers , the connection parts being provided intermittently in a length direction of the optical fibers and in a width direction of the optical fibers , wherein: a marking configured to be visually recognized for identifying the optical fiber ribbon is provided to each optical fiber ; a position, in the optical fiber's circumferential direction, of the marking provided to at least one of the optical fibers is different from a position, in the optical fiber's circumferential direction, of the marking provided to another optical fiber ; characterised in that positions of a plurality of markings formed respectively on the optical fibers match one another in the length direction of the optical fibers ; the plurality of markings provided respectively at different positions in the length direction of each optical fiber are formed at different positions in the circumferential direction; and a size of each marking of the plurality of markings ranges from 3 to 30 mm in the length direction of the optical fibers . a marking configured to be visually recognized for identifying the optical fiber ribbon is provided to each optical fiber ; a position, in the optical fiber's circumferential direction, of the marking provided to at least one of the optical fibers is different from a position, in the optical fiber's circumferential direction, of the marking provided to another optical fiber ; characterised in that positions of a plurality of markings formed respectively on the optical fibers match one another in the length direction of the optical fibers ; the plurality of markings provided respectively at different positions in the length direction of each optical fiber are formed at different positions in the circumferential direction; and a size of each marking of the plurality of markings ranges from 3 to 30 mm in the length direction of the optical fibers . <EOS>