The full-body scanner is a device that creates an image of a person's nude body through their clothing to look for hidden objects without physically removing their clothes or making physical contact. They are increasingly being deployed at airports and train stations in many countries.

One technology used under the name "full-body scanner" is the millimeter wave scanner, in which extremely high frequency radio waves are reflected off the body to make an image on which one can see some types of objects hidden under the clothes. Another technology in use is the backscatter X-ray.

Two advantages of full-body scanners over a physical strip search are that it is quicker (takes only 15 seconds) and that people do not have to be touched in a manner that some might consider offensive. A disadvantage is that the scanners are being used to perform routine, virtual strip searches without probable cause which opponents claim are illegal and violate basic human rights. Furthermore, the true long term health effects of these technologies are unknown.