The 2005–06 Croatian Football Cup was the fifteenth season of Croatia's football knockout competition.

Calendar

Preliminary round

The preliminary round was held on 31 August 2005.

First round

Matches played on 21 September 2005.

Second round

Matches played on 19 October 2005.

Quarter-finals

First legs were held on 9 November and second legs on 15 November 2005.

Semi-finals

Rijeka won 2–1 on aggregate. Varteks won 5–4 on aggregate.

Final

First leg

Second leg

Aggregate score was 5–5, Rijeka won on away goals rule.