Erkki Ossi Olavi Pulliainen (23 June 1938 in Varkaus – August 2022 in Joroinen) was a Finnish biologist and politician and member of Finnish Parliament, representing the Green League. He was first elected to the parliament in 1987 and was continuously a member until the election in spring 2011. From 1985 to 1999 he was also a member of the city council of Oulu.