The Argentine departs after 18 months in charge after failing to win a much-coveted Champions League title for the Paris club
Paris Saint-Germain have sacked manager Mauricio Pochettino despite the former Tottenham Hotspur boss leading the team to the Ligue 1 title with the French club.
Pochettino was appointed PSG boss in January 2021, replacing the sacked Thomas Tuchel.
However, he was unable to lead the club to the Ligue 1 title in his first season in charge, pipped by his expected successor Galtier at Lille.
PSG lost in the semi-final of the Champions League in the 2020/21 season to Pep Guardiola's Manchester City.
Pochettino performed better in Ligue 1 last season, running away with the title by 15 points.
But again there was failure in Europe. They could not make it beyond the last-16 despite leading 1-0 against Real Madrid following the first leg in Paris.
After months of speculation over his future, PSG announced on Tuesday the departure of the 50-year-old.
PSG said in a statement on their website: "Paris Saint-Germain confirm that Mauricio Pochettino has ended his role at the club.
"A former captain of the Rouge & Bleus, Pochettino took charge of 84 competitive games, winning 55, drawing 15 and losing 14.