Alassane Alexandre Plea (born 10 March 1993) is a French professional footballer who plays as a striker or winger for Borussia Monchengladbach and the France national team.

Plea made his senior debut for Lyon on 7 October 2012 in an away Ligue 1 match against Lorient. On 20 October 2016, Plea scored the only goal in the 1-0 away victory against Red Bull Salzburg in the 2016–17 UEFA Europa League Group I match. That was Nice's first-ever UEFA club competition away win. On 20 February 2017, Plea underwent arthroscopy of the right knee in Lyon. In July 2018, Plea joined Borussia Monchengladbach on a five-year contract. The transfer fee paid to Nice was reported as €25 million.

He is a France youth international having represented his nation at under-18, under-19, under-20 and under-21 levels. He played with the under-19 team at the 2012 UEFA European Under-19 Football Championship. In November 2018, Plea was called up into the senior team for the first time.