A high voltage submarine cable, the cable (10) comprising principally two as such conventional cable cores (12, 13) arranged side by side thereby providing a flat cable, each core (12, 13) comprising a conductor (14) and a conductor screen (15) surrounded by an insulation (16) with an insulation screen (17) and further a lead sheath (18) as well as a steel tape reinforcement (19), the two cores (12, 13) being bundled together by a tape bedding (22) thereby also enclosing suitable filling (20), a cross tape armouring (22) of galvanized steel tapes being wound around the two cores (12, 13), surrounded by at least one layer of a transversal reinforcement (23) saturated with asphaltic compound.