The Greek Cup 1981–82 was the 40th edition of The Greek Football Cup, or Greek Cup for short.

Totally 58 teams participated, 18 from Alpha Ethniki and 40 from Beta Ethniki. It was held in 6 rounds, included final.

It was a competition that remained in history for one of the most discussed matches between the eternal enemies, Panathinaikos and Olympiacos. The match was held just in Second Round, in a single match, and overshadowed everything else in the competition. The match became in Apostolos Nikolaidis Stadium and was judged in extra time, with Panathinaikos to score 3 times (2 goals with penalty, they lost one more) and to finish with 10 players, and Olympiacos to score 2 goals and to be cancelled one more. Αll these happened in first 12 minutes of rivalry. Both teams had complaints by the referee.

In other matches, PAOK won AEK Athens 6–1 and the qualifications of Panathinaikos, against Iraklis in extra time, while the administration of Panathinaikos had prohibited to entry television cameras in the second leg, and against PAOK in semi-finals with a goal to last minute of the second game.

In the Final, they faced Larissa who qualified for the first time in their history in a Greek Cup Final. Panathinaikos won 1–0,^[1] however was not awarded the cup, but a commemorative trophy, since an objection by Olympiacos was pending at their expense, for the affair of outlaw Hellenisation of footballer Juan Ramón Rocha. The handing-over became two months later, after the end of those events.

First legs were played on March 31, 1982. Second legs on April 28.

First legs were played on May 19, 1982. Second legs on June 2.

The 38th Greek Cup Final was played at the Nikos Goumas Stadium, Athens.