Sex Box is a British television series. The first series was hosted by Mariella Frostrup. The series was produced by independent production company Clearstory and broadcast on Channel 4. The show's premise centres upon the idea that couples will be more open to sexually themed discussions after having performed the act itself. The show's hosts have the couple retire to a private "sex box" on stage, where they are to have sexual intercourse with one another.

Sex Box was released as part of Channel 4's "Campaign for Real Sex", which the channel described as "a series of programmes which aim to reclaim sex from porn". The programme provoked controversy and debate in both the British and international press. Some reviews of the programme were positive, praising the sincerity of the programme's aims. However, many critics and viewers panned the show, and ratings for the first episode showed that while 1.1 million viewers tuned into the show, this number dropped by 200,000 after the first 15 minutes.Series 2 began broadcasting on 4 April 2016. It is presented by Goedele Liekens and Steve Jones.