Defence & Security Equipment International ( DSEI ) is a fair for defense systems and equipment, which is held every two years in London Docklands, with thousands of visitors from the trade and military. It is an important event in the international arms trade and co-organized with the National Defence Export Services Organisation ( DESO ).

Alternating with DSEI is Eurosatory place in Paris.


Between 1976 and 1991 the British army and the British Royal Navy their equipment fairs held alternately in Aldershot and Portsmouth. Overseas delegations visited the exhibition invitation only, invitations were governments which do not pay attention so much to the human rights. Despite the war with Iran, also attended a delegation from Iraq the fair.

As of 1993, the two fairs were combined and met every year until the British government decided to privatize the fair. The company Spearhead launched the first DSEI in 1999 at Chertsey, Surrey. In 2001, the trade fair ExCeL Exhibition Centre in London Docklands. It was followed by the renaming of Defence Systems & Equipment International at Defence & Security Equipment International.


The State DESO published the official invitation list for the DSEI, with a subsequent list, which was approved by the organizers. Many of the invited countries are accused of abuse human rights.


The show attracted the attention of many activists against arms trade. The Mayor of London, Ken Livingstone, is a critic of the DSEI, the London police refers mainly to the cost of security measures which caused the fair.

At the fair in September 2013 in London, exhibitors Magforce International ( from France) and Tian Jin MyWay International Trading ( Beijing, China) offered in catalogs leg irons and electric batons. Such objects are, according to British law as " not desirable ". After the Green MEP Caroline Lucas had published that the estates of the two companies were cleared at the ExCel Centre in London's Docklands.