The 25-year-old burst onto the scene at Chelsea under Frank Lampard back in 2019 but decided to then leave his boyhood club and join Brighton in January 2020.
Lamptey would spend five-and-a-half seasons at Brighton before leaving in search of more regular football and joining Serie A side Fiorentina.
Unfortunately for Lamptey, he would make just two appearances for the club after suffering a serious anterior cruciate ligament (ACL) injury.
QPR have now confirmed that Lamptey has joined the Championship side as a free agent.
“I'm excited for the opportunity ahead,” Lamptey told QPR’s website.
“When I spoke to the gaffer and Christian (Nourry), the project was an encouraging one. The team have ambitious goals for this season, so I'm looking forward to it.”