Conniver (1944–1970) was an American Thoroughbred racehorse who was voted the 1948 American Champion Older Female Horse. Bred by Alfred G. Vanderbilt II, she was purchase as a yearling by New York City businessman and sculptor, Harry La Montagne.When her racing days were over, Conniver was used as a broodmare. Of her six foals, Clandestine and Plotter won important American Graded stakes races.