To solve the problem that, as more medical oxygen condensers as home medical equipment have been recently used in ordinary houses, the failure to clean a dirty air filter or the insufficient cleaning of the filter may cause the filter clogging, often resulting in a mechanical breakdown of the oxygen condenser itself.

This dust removing air filter of a medical oxygen condenser is made of a plain-woven synthetic resin mesh to be used as a filtering material, and pleated in a zigzag, which greatly increases the area to be used for filtration in the filtering material without changing the size of the air filter in cross section. Therefore, it substantially improves the dust catching capacity, while preventing the filter clogging for a longer period of time.