The General Union of Carpenters and Joiners (GUC&J) was a trade union in the United Kingdom. The union was founded in 1827 by the amalgamation of various local societies in London. Originally named the Friendly Society of Operative House Carpenters and Joiners of Great Britain and Ireland, in 1863 it was renamed as the Friendly Operative Carpenters and Joiners General Union of Great Britain, and was thereafter universally known as the "General Union of Carpenters and Joiners".