Kristian Schreiner (29 July 1874 – 3 May 1957) was a Norwegian professor of medicine. He was born in Ekeberg as a son of wholesaler Christian Emil Schreiner (1829–1879) and Bethy Gerhardine Bødtker (1832–1910). He was a relative of educator Emil Schreiner. In September 1900 he married Alette Falch. They had a son Johan Schreiner, and through another son Fredrik Schreiner they had the grandson Per Schreiner.