A control group for directional fins on missiles and/or shells comprises a containment body (15, 15null, 15null) carrying on the outside two command surfaces in the form of fin or half-fin surfaces (13, 14) which are hinged (at 24, 25), directable and motorized, in which the containment body (15, 15null, 15null) foresees two housings (16) each of which receives an electric motor (17, 17null) which commands, through a gear-dowm group (19, 29; 19null, 29null), the oscillation about an axis (Z) of the control group of a pair of rings (21, 22), arranged in annular seats (31, 32) and in which end attachments (26) of the half-fins (13, 14) engage, the half-fins (13, 14) being hinged diametrally opposed in a further ring (20) arranged in an annular seat (23) of the containment body (15, 15null, 15null) free to rotate about the axis (Z).