"Heart of Glass" is a song by the American new wave band Blondie, written by singer Debbie Harry and guitarist Chris Stein. It was featured on the band's third studio album, Parallel Lines (1978), and was released as the album's third single in January 1979 and reached number one on the charts in several countries, including the United States and the United Kingdom.

Blondie is an American rock band formed in 1974 in New York City by singer Debbie Harry and guitarist Chris Stein. The band was a pioneer in the American new wave scene of the mid-1970s in New York City.