Ihar Mikalaevich Zhalyazouski or Igor Nikolayevich Zhelezovski or Ihar Mikałajevič Žalazoŭski (Belarusian: Ігар Мікалаевіч Жалязоўскі; Russian: Игорь Николаевич Железовский; 1 June 1963 – 12 June 2021) was a Soviet and Belarusian speed skater.

His imposing physical appearance resulted in the nicknames "Igor the Terrible" and "The bear from Minsk".

Originally competing for the Soviet Union, then for the Commonwealth of Independent States, and finally for Belarus, he became World Sprint Champion a record six times.

In Soviet times, he trained at Armed Forces sports society in Minsk.

It was during this time that he achieved a career highlight of winning the silver medal in the 1000 m event at the 1994 Winter Olympics in Lillehammer, Norway.