Henri Constant Gabriel Pierné (16 August 1863 – 17 July 1937) was a French composer, conductor, pianist and organist.

His family moved to Paris, after Metz and part of Lorraine were annexed to Germany in 1871 following the Franco-Prussian War.

His teachers included Antoine François Marmontel, Albert Lavignac, Émile Durand, César Franck (for the organ) and Jules Massenet (for composition).

Pierné wrote several operas, choral and symphonic pieces as well as a good deal of chamber music.

His most famous composition is probably the oratorio La Croisade des enfants based on the book by Marcel Schwob.