Choupo-Moting scored five Premier League goals in his sole season with Stoke as they were relegated from the Premier League, but Ligue 1 champions PSG have swooped to secure the 29-year-old on a two-year contract.
Coach Thomas Tuchel confirmed the imminent arrival of the Cameroon international earlier on Friday and, after signing Juan Bernat from Bayern Munich, Choupo-Moting maked an unlikely conclusion to PSG's business in this window.
"I am extremely honoured to be signing for this big European club, Paris Saint-Germain," Choupo-Moting told PSG's official website.
"I would like to thank the directors and the coach for the confidence they have shown in signing me. I will give my absolute maximum out on the pitch, every day, to show my dedication to my new club.
"Coming to France, a big football country, is a fantastic moment in my career. I will be playing with some extraordinary teammates and I can't wait to experience the atmosphere at the Parc des Princes!"
The Hamburg-born attacker scored 10 goals in a pair of Bundesliga seasons under Tuchel at Mainz, before moving on to Schalke, where he would 18 times in the league over the next three seasons.
The Choupo-Moting then moved to Stoke on free, where he played in 29 Premier League games, netting five times.
A former Germany youth international, Choupo-Moting chose to represent Cameroon at the senior level and has received 45 caps from the African nation.