A significant shock occurred within the third spherical when First Division aspect Clyde defeated Cup holders Celtic 2–1. Rangers have been knocked out of on the fourth spherical stage, dropping 3–0 at house to Hibernian. East of Scotland League membership Spartans reached the fourth spherical earlier than ultimately dropping to St Mirren after a replay.
The 2005–06 Scottish Cup was the 121st season of Scotland’s most prestigious soccer knockout competitors, additionally identified for sponsorship causes because the Tennent’s Scottish Cup. The Cup was gained by SPL membership Heart of Midlothian who defeated Second Division aspect Gretna on penalties after a 1–1 draw within the ultimate. Hearts turned the primary non-Old Firm membership to win the Cup since they themselves gained it in 1997–98. Gretna earned a spot within the UEFA Cup with Hearts having already certified for the Champions League through the SPL.