A product gas filter with a filter housing, into which product gas of a wood gas reactor is supplied, by means of a product gas line, and is discharged as clean gas through a clean gas line. Long-chain hydrocarbons in the product gas stream can be at least substantially reduced, and a high filter performance achieved, where the filter is divided gas-tight into two parts by a separating tray in such a way that the product gas line is delivered to the lower region and the clean gas line exits from the upper collecting space; at least two filter cartridges, each coupled individually to a compressed air line and compressed air source, project into the lower region; and a zeolite container is connected to the lower portion of the filter via a compressed air source connectable, Venturi nozzle and a lockable line.