To provide a flue duct cleaning device made unmanned in the cleaning of the inside of a flue duct and improved in working efficiency.

The flue duct cleaning device 1 is constituted of a hanging part 2 hung inside the flue duct and a cleaning means 10 for cleaning the inside surface of the flue duct and the cleaning means 10 is formed by attaching a cleaning body part 12 such as a brash to the hanging body part 2 with an attaching supporting part 11. Each attaching supporting part 11 is attached spirally on the outer peripheral surface of the hanging body part 2 and the cleaning body part 12 forms a slope surface 12b along the spiral. The cleaning means 10 formed spiral in this way generates the revolution force to rotate the cleaning body part 12 and the flue duct cleaning device 1.