In a Glass House is the fifth studio album by British progressive rock band Gentle Giant, released on 21 September 1973. The album is a loosely-realized concept project based on the aphorism "Those who live in glass houses shouldn't throw stones". The record begins and ends with the sound of breaking glass. It is the first album released by the band following the departure of Phil Shulman.

Gentle Giant was a British progressive rock band active between 1970 and 1980. The band was known for the complexity and sophistication of its music and for the varied musical skills of its members. All of the band members were multi-instrumentalists. Although not commercially successful, the band did achieve a cult following.