Marc Carbonneau (born May 29, 1933) is a convicted terrorist and taxi driver.

Carbonneau, born in Quebec, Canada, is a left-wing political activist who advocated violence. He was a member of the Front de Libération du Québec

A member of the FLQ’s “Liberation Cell,” that included Louise Lanctôt, Jacques Cossette-Trudel , Jacques Lanctôt, Yves Langlois and Nigel Hamer , on October 5, 1970 they put their kidnapping plans into action with the armed abduction of James Cross, the United Kingdom Trade Commissioner to Canada.

Marc Carbonneau and other members of the Liberation cell, will hold James Cross hostage, taking his photo and sending it to police with a list of demands that included money and the release of other convicted terrorists. They advise authorities that Cross will be executed and further threats to Cross’ life were delivered to several radio stations along with the terrorists demands.

Early in December of 1970, police discovered the location of Marc Carbonneau and his fellow terrorists holding James Cross. His release was negotiated and on December 3, 1970, Carbonneau plus the four other terrorists, were granted their request for safe passage to Cuba by the Government of Canada after approval by Fidel Castro. Although Carbonneau had asked to go to communist Cuba and was exiled from Canada for life, he secretly left Cuba to live in Paris, France. After a few years there, he wanted to return to Canada and began secret negotiations through the reigning government Parti Québécois to achieve that goal. Eventually, the Federal Government consented and Carbonneau returned to Canada from Paris on May 25, 1981. He was charged with conspiracy, forcible detention and extortion in connection to the kidnapping of James Cross. He plead not guilty and was released on bail. On October 22, he went back to court and changed his plea to guilty in the kidnapping of James Cross.

On March 23, 1982, Marc Carbonneau was sentenced to 20 months in jail for kidnapping, forcible confinement, conspiracy and extortion.