Injectable filler (injectable cosmetic filler, injectable facial filler) is a soft tissue filler injected into the skin to help fill in facial wrinkles, restoring a smoother appearance. Most of these wrinkle fillers are temporary because they are eventually absorbed by the body. Some people may need more than one injection to achieve the wrinkle-smoothing effect. The effect lasts for about six months or longer. Successful results depend on health of the skin, skill of the health care provider, type of filler used.

     In Europe and the UK, fillers are non-prescription medical devices that can be injected by anyone licensed to do so by the respective medical authorities. They require a CE mark, which regulates adherence to production standards, but does not require any demonstration of medical efficacy.