The French Belgian Sign Language (, LSFB) is the deaf sign language of the French language Community of Belgium, a country in Western Europe.
It is closely related to the Flemish Sign Language, with differences primarily in mouthings, but is generally regarded today as distinct from it. It is distantly if at all related to French Sign Language.
By decree of 22 October 2003, the Parliament of the French Community recognised the Sign Language of French-speaking Belgium.