Yelena Grigoryevna Mazanik (Russian: Еле́на Григо́рьевна Маза́ник, Belarusian: Але́на Рыго́раўна Маза́нік, romanized: Aliena Ryhoraǔna Mazanik; 2 March 1914 – 7 April 1996) was a Soviet Belarusian partisan responsible for the assassination of Wilhelm Kube, General-Kommissar of Nazi-occupied Belarus, whom she killed by placing a small time-bomb under his bed while working for him as a housemaid.

Mazanik was born on 2 March 1914 to a Belarusian peasant family in the village of Poddegtyarnaya of the Minsk Governorate, then part of the Russian Empire.

Her education was average for the time, as she graduated from only six grades of school before leaving in 1931 to work as a waitress at the dining room of the Byelorussian SSR Council of People's Commissars.

She then met with several other partisans, and after a few bumps in the road Mariya Osipova provided Mazanik with a bomb and a poison capsule in case she was caught.

Anita and her youngest child went on a shopping trip, leaving only Mazanik and one other servant in the house; she then entered Kube's bedroom and planted the small bomb under his bed between the mattress and springs.

[2][9][10] Late at night on 12 October all of the conspirators in the plot were flown out of Belarus to Moscow, and after writing the final report on the mission the partisans were interrogated by Vsevolod Merkulov, Bogdan Kobulov, and Fyodor Kuznetsov at the Lubyanka.

[1][9] Soviet intelligence agencies had assigned the task of killing Kube to twelve different partisan units, several leaders of which assumed that their members were the ones who executed the plot when they got news of his death.

One leader of a partisan unit in Belarus, Stepan Kazantsev, claimed that a prisoner in the Minsk ghetto by the name of Leo Lieberman had planted the bomb under Kube's bed.