Haploops antennata, a new Haploops species is described based on an adult femelle collected in the Concarneau area (French coast, North Atlantic Ocean). This species is characterized by the presence of only one superior pair of corneal lenses, the antenna 1 longer than the antenna 2 and the pereopod 7 basis narrow with inner side setose. A comparison is done with the Haploops species known and having only one superior pair of corneal lenses. A key of the 20 valid species in the genus Haploops is given.