The National Union of Commercial Travellers was a trade union representing travelling salespeople in the United Kingdom.
The union was founded in 1921 as the United Kingdom Commercial Travellers.
While it remained a small organisation, the union funded a school in Pinner, the Royal Commercial Travellers School, and organised numerous social activities.
J. F. Denning had become general secretary the previous year, and membership steadily fell under his leadership.
By 1969, it had fewer than 200 members, and so the following year, it merged into the Association of Scientific, Technical and Managerial Staffs.