This research discussed about the Tradition of the Ghatib Beghanyut which is a Ritual Tolak Bala by means of dhikr and prayer on the Ferri Vessel and an engine Boat that drifts following the flow of the Siak river carried out by the Siak community. The author used Tallcot Parsons Social Systems Theory to analyze the phenomenon of this research. The type of approach of this research used is des…