The British Microlight Aircraft Association (BMAA) is the organisation that governs microlight aircraft in the UK.
Originally the British Minimum Aircraft Association (with the same logo and acronym), BMAA became the delegated authority for airworthiness and flight training of most microlight flying in the United Kingdom around 1984 with the introduction of British Civil Airworthiness Requirement (BCAR) Section S which was the world's first formal airworthiness standard for microlight aeroplanes. Its delegations are primarily from the Civil Aviation Authority (CAA)
The BMAA administers all weightshift controlled microlight aeroplanes in the United Kingdom, all regulated powered parachute microlights, and a large proportion of 3-axis controlled microlight aeroplanes, including all "factory built" microlights. The Light Aircraft Association is an equivalent organisation which administers a proportion of the amateur built microlight aeroplanes.
The BMAA's remit substantially overlaps with that of the UK's Light Aircraft Association (LAA), and a merger of the two associations has occasionally been proposed but has generally met with considerable resistance, particularly from the BMAA's majority membership of weightshift controlled microlight pilots.