To reduce a labor and a time required for cleaning work by allowing a user to easily clean a low-pass filter.

A cleaner 1 for low-pass filters for cleaning a low-pass filter in a lens exchangeable digital camera, has an elongated air suction tube 6 having a cleaning brush 14 attached at the end so as to contact with the low-pass filter, and an air suction fan 4 connected to the base side of the air suction tube 6 to generate an air flow inside the air suction tube 6 from the end side to the base side.