Pirkko Helena Saisio (born 16 April 1949) is a Finnish author, actress and director.

Saisio has a broad literary output, dealing with many kinds of texts from film screenplays all the way to librettos for the ballet.

Her novel Betoniyö (1981) was adapted into a feature film Concrete Night in 2013 by Pirjo Honkasalo.

Saisio received her degree in acting from Suomen teatterikoulu (now Theatre Academy) in 1975 and worked there as a professor of dramaturgy in 1997 and 2001.

Pirkko Saisio lives in a same-sex partnership with film director Pirjo Honkasalo.