Groups of demonstrators have stripped off at airports in Berlin, Frankfurt and Dusseldorf in reaction to the news that officials are considering installing the scanners during the coming year.
A number of governments around the world are looking at using the controversial technology in a bid to boost airport security.
Checking in: Members of the 'Piraten Partei' walk through Berlin-Tegel airport
The demonstration was organised by the Piraten Partei (Pirate Party) - a group who say on their website that they stand up for 'civil liberties'.
Protestors, using the motto 'you do not need to scan us - we are already naked', scrawled messages on their bodies including 'something to hide?' and 'be a good citizen – drop your pants'.
Fleshmob: The group say they are standing up for civil liberties and are protesting at full-body scanners
Champions of the devices - which not only reveal hidden weapons or explosives but also breast enlargements and a hazy outline of travellers' genitals - say it will hasten security checks.