Émile Joachim Constant Puyo (November 12, 1857 – October 6, 1933) was a French photographer, active in the late 19th and early 20th centuries.

As the leading advocate of the Pictorialist movement in France, he championed the practice of photography as an artistic medium.

[3] His father, Edmond Puyo (1828–1916), was a painter, amateur archaeologist, and politician, who served as Mayor of Morlaix in the 1870s.

[7] He wrote several articles for the club's Bulletin, establishing himself as the chief theoretician of the French Pictorialist movement.

[7] After World War I, the decline of Pictorialism in favor of straight, unmanipulated photographs was a source of continuing frustration for Puyo.

[7] Common themes in Puyo's photographs include landscapes, female figures in various poses, and various aspects of late 19th-century Parisian life.