Man on a String (also known as Confessions of a Counterspy) is a 1960 American spy thriller directed by Andre de Toth and starring Ernest Borgnine and Kerwin Mathews.

A government intelligence agency in Washington, D.C. wants agent Frank Sanford to follow Boris Mitrov, a film producer who appears to also be a Russian spy.

A checkpoint is closed, but Boris shoots a police officer and escapes safely to West Berlin, only to end up in a fight for his life with a Russian assassin.

Stanley Kauffmann of The New Republic wrote: "The dialogue and characterizations in this picture cripple the putative truth of the message it intends to deliver.

"[3] Man on a String was released on DVD by Sony Pictures Home Entertainment on March 4, 2011 via its DVD-on-demand system available through Amazon.