Rubber composition for cable connector seals

A rubber composition for cable connector seals is disclosed. The rubber composition comprises a specific ethylene/±-olefin/non-conjugated polyene copolymer [A], a specific organopolysiloxane [B] and an SiH group-containing compound [C], with the weight ratio of [A]:[B] being 100:0 to 5:95. A cable connector seal according to the present invention comprises the composition. An automotive cable connector according to the present invention is sealed by the composition. The present invention provides a crosslinkable rubber composition that has excellent sealing properties and insertion properties with respect to cables without oil bleeding. Further provided are a cable connector from the composition and an automotive cable connector including the seal.