64-year-old Rosavena Bop says she received a letter signed by the finance minister, David Adeang, last month saying she would no longer receive her payment because she attended protests outside parliament in June.
She says she was never arrested or charged for attending the protest, and the decision to cancel her pension came as a complete surprise.
Ms Bop says she will struggle without her pension, but has no regrets about supporting the MPs for her district of Meneng, who have been suspended from parliament for over a year.
