Abstract: Improved chimney flue cleaning apparatus including a chimney cap operable to support a pair of horizontally disposed pulleys; a horizontally disposed drum rotatably mounted in the flue adjacent its lowermost end; a handle for rotating the drum; and an endless cable, with attached brush, threaded about the pulleys and drum. The drum is provided with a single groove helically wound about its exterior surface in threadlike manner. The cable may be wrapped one or more turns about the drum to prevent slippage of the cable. A cable adjustment is provided for controlling cable tension. The brush may be provided with arms having cable engaging apertures for proper centering and stability of the brush as it moves in a vertical upward and downward direction, dependent upon the direction in which the drum is rotated.