Abstract: A sink strainer clamp comprises a body, a pair of opposing arm segments telescopingly engaging said body with each of said arm segments having an arm extension with a first end for engaging the interior surface of a basin, and interchangeable adapter fittings removably attached to said body with each adapter fitting adapted for engaging a different strainer configuration. The body incorporates an internal spring for outwardly biasing the arm segments so that the arm segments can be compressed against the spring to facilitate placement of the clamp within a basin. After placing the clamp within a basin, the adapter is aligned to engage the strainer of the basin and the arm segments are then released to securely retain the clamp within the basin. A retaining nut which mounts the strainer to the basin can then be removed by the person who installed the clamp.