The Silent Partner is a 1978 Canadian thriller film directed by Daryl Duke and starring Elliott Gould, Christopher Plummer, and Susannah York. The screenplay by Curtis Hanson is based on the novel Think of a Number (Tænk på et tal) by Danish writer Anders Bodelsen, and is the third filmed adaptation of the novel.

The film was the first to be produced by Carolco Pictures and one of the earliest films from within the country to take advantage of the Canadian government's "Capital Cost Allowance" incentive plan, which gave production companies tax inducements to make commercial films in Canada. It has been called "one of the few truly good films to come out of the tax-shelter heyday of the 1970s."The Silent Partner is also notable for being one of the very few films to have a score composed by jazz great Oscar Peterson, and for featuring an early big-screen appearance by John Candy. It was a major critical and commercial success, winning three Canadian Film Awards including Best Feature Film and Best Direction.