Sergei Mikhailovich Kudryavtsev (Russian: Сергей Михайлович Кудрявцев; 1915–1998) was a senior Soviet intelligence officer who served as the Soviet Ambassador to Cuba from August 22, 1960 to May 30, 1962.[1] Kudryavtsev did not speak Spanish, nor did he have connections with the Cuban government. As a result, Alexander Alexeyev, who had been in Cuba since 1959, served as his cultural advisor for the duration of his appointment.[2] Kudryavstev was expelled from Cuba in 1962 by Fidel Castro for open and excessive political activities, and was replaced by Alexeyev.[3]