Martin Andersen Nexø (26 June 1869 – 1 June 1954) was a Danish writer. He was the first significant Danish author to depict the working class in his writings, and the first Danish socialist, later communist, writer.
Martin Andersen Nexø was born to a large family (the fourth of eleven children) in Christianshavn, at the time an impoverished district of Copenhagen. In 1877, his family moved to Nexø, and he adopted the name of this town as his last name. Having been an industrial worker before, in Nexø he attended a folk high school, and later worked as a journalist. He spent the mid-1890s travelling in Southern Europe, and his book Soldage (1903) (English: Days in the Sun) is largely based on those travels.