To provide a easily attachable and disposable range hood filter capable of being securely fixed to a metallic filter without using magnet, a surface fastener, an installing component and the like, and reducing dirt such as soot and dust to an inner wall of the metallic filter or a fan.

This bag-shaped or cylindrical disposable filter 10 puts the metallic filter 4 therein and is attached to a range hood. The filter simultaneously covers a draft inflow surface side and a draft outflow surface side. Cavities of a front surface side filter 1 in the draft inflow surface side are made to be rough, and cavities of a rear surface side filter 2 in the draft outflow surface side are made to be fine.