French forward Jeremy Menez (Photo: AFP)
The 24-year-old, who won the first of his five caps for France in a friendly against Norway last August, had joined Roma from Monaco in 2008.
PSG have also signed midfielder Blaise Matuidi from St Etienne on a three-year deal.
The two players are the first to join the club since Brazilian Leonardo became director of football on July 13.
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