Lloyd Russell-Moyle, from the opposition Labour Party, said he wanted to "say to those living with HIV that your status does not define you".
He made the announcement during an adjournment debate on HIV and World Aids Day, which will be marked on December 1, saying he chose to speak out because he had "a duty as a Member of Parliament".
"The reality is that today, the prognosis is wildly different to what it was when it was bought to the public's attention. Or, we could go in the direction of the government, which is putting our hard-fought progress at risk".
A British politician has been given a standing ovation in the House of Commons after revealing he has been HIV positive for 10 years. These men's HIV statuses were entirely avoidable. I hope that more people will understand that effective treatment keeps people who are HIV positive healthy, and it protects their partners.
"Preventative medicine has had a big impact in our community and convenient rapid testing means it's never been easier for our clients", Mr Wright said. "That my story might encourage others to get tested and ultimately begin their treatment earlier on". He is the second MP to announce he has HIV while serving as a member of Parliament, after Chris Smith, and the first to do it in the chamber.
Said Russell-Moyle of World AIDS Day: "Such events are also deeply personal to me". In the Caribbean, 310,000 people are HIV positive, with 15,000 newly infected people discovered in 2017 alone.