A promotion play-off competition was held at the end of the season, involving the 3rd, 4th and 5th-placed teams in 2021–22 Ligue 2, and the 18th-placed team in
2021–22 Ligue 1. The quarter-final was played on 18 May and the semi-final was played on 21 May.
Round 1 Round 2 Promotion Play-off Final1st leg 2nd leg 2–2 on aggregate, Auxerre won 5–4 on penalties and were promoted to 2022–23 Ligue 1; Saint-Étienne were relegated to 2022–23 Ligue 2. ==Relegation play-offs==