Samples of a small coprinoid fungus were collected from rice straw in Amol, north of Iran. Specimens were transferred to PDA culture media and basidiocarps were appeared after two weeks. Using basidiocarps produced in laboratory, specimens were identified as Coprinopsis urticicola (Berk. & Broome) Redhead, Vilgalys & Moncalvo based on. (Knudsen & Vesterholt 2008, Uljé & Noordeloos 1997, Uljé 2005.