Angine de Poitrine is a Canadian rock duo formed in Saguenay, Quebec, in 2019. It is composed of two anonymous musicians performing under pseudonyms as guitarist Khn de Poitrine and drummer Klek de Poitrine. They are known for complex, microtonal compositions in the style of math rock and experimental rock, and an absurdist public image, featuring oversized papier-mâché masks and black-and-white polka-dotted costumes.

Conceived initially as a disguise to retain audiences across back-to-back sets at a local venue, the project became the duo's primary focus. Following their debut album, Vol. 1 (2024), the band gained traction on the Quebec festival circuit, culminating in an Artist of the Year win at the 2025 GAMIQ awards. They achieved viral recognition in February 2026 when a live session recorded for US radio station KEXP accumulated millions of views. This preceded the release of their second album, Vol. II (2026), and supporting international tours.