"We reject sanctions in any form, in particular those sanctions adopted by the United States and the European Union," he said, at a meeting here with his Cuban counterpart Bruno Rodriguez.
The top Russian diplomat's comments came as Moscow accused Washington of bringing back "Iron Curtain" policies in the showdown over the former Soviet republic and as the West slapped fresh sanctions against key figures -- including Russia's military chief.
"We stand for the speedy settlement of this crisis," said Lavrov, speaking through an interpreter.
Referring to the fall of former Ukrainian president Viktor Yanukovych, Lavrov thanked Cuba for its "firm support for the Russian position on the Ukraine crisis generated by the coup supported by Western powers."
Lavrov gained a resounding endorsement for the Russian position from Rodriguez, who said Cuba "energetically rejects" the sanctions.
Moscow and Havana were close allies for 30 years during the Cold War, until the collapse of the Soviet Union in 1991.
After a rift under former Russian president Boris Yeltsin, the two resumed political and economic ties, as well as military cooperation.
Lavrov was scheduled to travel from Havana to the Peruvian capital Lima.
