Connector element for connecting together windshield wiper blades and their operating arms (11,11a;12,12a), said arms being formed in the manner of an overturned U directed towards the windshield with its free end (11a,12a) from which a shaped tongue extends outwards in a longitudinal direction (X-X) comprising: - a body which has. a substantially parallelepiped shape with upper base and outer vertical sides;. a rear flange which extends in the transverse direction (Y-Y) and the opposite ends of which project in the transverse direction (Y-Y) beyond the sides (20b,20c) and are formed as respective reliefs oriented in the longitudinal direction (X-X);. a distal front part formed in the manner of a nose tapered from the upper base towards a bottom front end edge; a respective guide with a curvilinear extension tapered parallel to the upper surface of the nose being formed on the upper part of said nose along each side;. a front tongue which extends longitudinally between the two sides and the proximal end of which inside the body is fixed thereto, while the opposite distal end is free, the tongue having a suitable elasticity for allowing the elastic deformation thereof along the vertical direction (Z-Z); the free end of the tongue having a tooth with vertical edge directed towards the inside of the body;. a space, open upwards, formed in the nose and bounded by the sides of the body and by the tongue inside the two said sides; - a cover which has • a form and dimensions complementing those of the nose of the body, vertical sides with a free end folded in the manner of a "C" inwards in the transverse direction (Y-Y), so as to form sliding elements suitable for sliding on the guides of the nose of the body; • a front part with a recessed seat bounded by a vertical partition suitable for engagement with the said tooth of the tongue. - a body which has. a substantially parallelepiped shape with upper base and outer vertical sides;. a rear flange which extends in the transverse direction (Y-Y) and the opposite ends of which project in the transverse direction (Y-Y) beyond the sides (20b,20c) and are formed as respective reliefs oriented in the longitudinal direction (X-X);. a distal front part formed in the manner of a nose tapered from the upper base towards a bottom front end edge; a respective guide with a curvilinear extension tapered parallel to the upper surface of the nose being formed on the upper part of said nose along each side;. a front tongue which extends longitudinally between the two sides and the proximal end of which inside the body is fixed thereto, while the opposite distal end is free, the tongue having a suitable elasticity for allowing the elastic deformation thereof along the vertical direction (Z-Z); the free end of the tongue having a tooth with vertical edge directed towards the inside of the body;. a space, open upwards, formed in the nose and bounded by the sides of the body and by the tongue inside the two said sides;. a substantially parallelepiped shape with upper base and outer vertical sides;. a rear flange which extends in the transverse direction (Y-Y) and the opposite ends of which project in the transverse direction (Y-Y) beyond the sides (20b,20c) and are formed as respective reliefs oriented in the longitudinal direction (X-X);. a distal front part formed in the manner of a nose tapered from the upper base towards a bottom front end edge; a respective guide with a curvilinear extension tapered parallel to the upper surface of the nose being formed on the upper part of said nose along each side;. a front tongue which extends longitudinally between the two sides and the proximal end of which inside the body is fixed thereto, while the opposite distal end is free, the tongue having a suitable elasticity for allowing the elastic deformation thereof along the vertical direction (Z-Z); the free end of the tongue having a tooth with vertical edge directed towards the inside of the body;. a space, open upwards, formed in the nose and bounded by the sides of the body and by the tongue inside the two said sides; - a cover which has • a form and dimensions complementing those of the nose of the body, vertical sides with a free end folded in the manner of a "C" inwards in the transverse direction (Y-Y), so as to form sliding elements suitable for sliding on the guides of the nose of the body; • a front part with a recessed seat bounded by a vertical partition suitable for engagement with the said tooth of the tongue. • a form and dimensions complementing those of the nose of the body, vertical sides with a free end folded in the manner of a "C" inwards in the transverse direction (Y-Y), so as to form sliding elements suitable for sliding on the guides of the nose of the body; • a front part with a recessed seat bounded by a vertical partition suitable for engagement with the said tooth of the tongue.