Gustave Marissiaux (1872 - 1929) was a Belgian pictorial photographer.
As a law student, he took up photography in 1894, and was elected the same year to the Belgian Association of Photography (B. A.P.). His country views denote a symbolist influence. Portrait is also an important part of his work. He not only practised it as a professional, in the studio he opened in Liиge in 1899, but also as an artist, in numerous "Studies." Recognized as one of the most important Belgian Pictorialist, he not only took part in the national Salons of the B. A.P., but also in several European Salons. By combining photography projection, poetry and music, he created a new form of "total spectacle," based on his images of Venice (1903). A public order was addressed to Marissiaux by the Syndicate of Coal Board. This series of stereoscopic views entitled "The Coalmine," and the album "Artist's Visions" (1908), are Marissiaux's most well-known works. He also elaborated a colour technique with the collaboration of Joseph Sury, in the course of the 1910's and 1920's.