Ana Belén Montes (born February 28, 1957) is a former American senior analyst at the Defense Intelligence Agency in the United States who spied on behalf of the Cuban government for 17 years. On September 21, 2001, Montes was arrested and subsequently charged with conspiracy to commit espionage for the government of Cuba. Montes pleaded guilty to spying and in October 2002, was sentenced to a 25-year prison term followed by five years' probation.