The 2005–06 Belarusian Cup was the 15th edition of the football knock-out competition in Belarus.
Contrary to the league season, the competition has been conducted in a fall-spring rhythm. The first games were played on 14 June 2005 and the final on 27 May 2006. BATE Borisov won the Cup.
First round
13 teams from the Second League, all 16 teams from the First League and 3 amateur clubs started competition in this round. The games were played on 14 and 15 June 2005.
16 winners of previous round were joined by 14 clubs from Premier League. Two winners of previous round (Baranovichi and Polotsk) advanced to the Round of 16 by drawing of lots. The games were played on 23 and 24 July 2005.