To provide an anti-clogging device for exhaust pipe in which fine particles can be prevented from adhering to the inner circumferential surface of a gas exhaust pipe under a stage where am exhaust gas source is operating.

The anti-clogging device comprises an exhaust pipe 13 extending upward while being coupled with an exhaust gas source 12 and coupled, at the upper part thereof, with an exhaust pipe 14 extending laterally, a rotary drive source 15 disposed at the upper end of the exhaust pipe 13, and a flexible or bendable wire 18 suspended down into the exhaust pipe 13 from a position eccentric to the rotary shaft 16 of the rotary drive source 15. The rotary drive source 15 turns the wire 18 spirally to rub the inner circumfererntial surface of the exhaust pipe 13 thus preventing adhesion of line particles.