PSG confirmed the press call for 5.30pm at a five-star hotel in central Paris and reports in the French media claim the club will confirm the arrival of Di Maria from Manchester United.
The two clubs agreed a £44.3m fee for the transfer of the Argentine last weekend.
The 27-year-old then flew to Doha, where he underwent a medical.
During an interview in Qatar, Di Maria said he was “very happy to join PSG. I am going to try to bring the best of my abilities to put myself at the service of this team.
“We are going to try and go as far as possible in the Champions League.”
United signed Di Maria from Real Madrid for a British record £59.7m last summer, but after an impressive start, his form dipped and he only started one of the final 10 games of last season.