The National Cutlery Union was a trade union representing workers involved in the manufacture of cutlery in the United Kingdom, particularly in Sheffield. The union originated in 1914 when the Table and Butcher Knife Hafters' Trade and Provident Society merged with the Table and Butcher Blade Smithers' Association, forming the Cutlery Union. This initially had 1,072 members, but the figure gradually fell, reaching only 589 members in 1938. That year, it merged with the Amalgamated Scissors Workers Trade, Sick and Funeral Society, and added "National" to its name.