The Association of Headteachers and Deputes in Scotland (AHDS) is a trade union which represents head teachers, depute head teachers and principal teachers from nursery, primary and ASN schools in Scotland. it has over 2,100 members.
It was established in 1975. In 2008 it opened membership to primary principal teachers.
AHDS has no political affiliation and is not a member of the Scottish Trades Union Congress.