The Spaniard has been linked with moves to both Arsenal and Manchester United this summer after Liverpool missed out on qualifying for Europe next season.
Fresh rumours about his future have resurfaced after Athletico Madrid agreed to sell David De Gea to United, but Reins insists his future lies on Merseyside.
"I know Atletico are looking for a goalkeeper, but I won't be changing colours," he said.
"I have five-year contract with the Reds and I'm happy at Liverpool."
Reina also had kind words for his compatriot De Gea, and believes the youngster can follow in his footsteps and be a success in the Barclays Premier League.
"I very much welcome this news because David is a great keeper. When it becomes official he is going to start working to prove in the Premier League what a good goalkeeper who is."