The Teaching Support Staff Union (TSSU) is an independent, non-hierarchical and directly democratic labour union operating at Simon Fraser University in British Columbia, Canada. It represents adjunct labour at the University, including teaching assistants and sessional instructors.

Simon Fraser University (SFU) is a public research university in British Columbia, Canada, with three campuses, all in Greater Vancouver: Burnaby, Surrey, and Vancouver. The 170-hectare (420-acre) main Burnaby campus on Burnaby Mountain, located 15 kilometres (9.3 mi) from downtown Vancouver, was established in 1965 and comprises more than 30,000 students and 160,000 alumni. The university was created in an effort to expand higher education across Canada.