The Emergency Response Unit () of the Garda Síochána is a specialist armed intervention unit under the Special Detective Unit, formed to deal with situations that cannot be handled by regular Garda officers.
The ERU was formed as the Special Task Force in 1978, following a decision of Justice Ministers at the Ninth Council of the EEC at Brussels in 1975. The Special Task Force was based in Dublin and it formed part of the Special Detective Unit in Harcourt Street. This unit was renamed the Emergency Response Unit in 1987.
Most recently the ERU has been deployed to trouble spots in Dublin and Limerick to tackle gun crime.
The Barr Tribunal's investigation into the shooting of John Carthy in Abbeylara in 2000 brought the ERU's existence and role to public attention in recent years, and ERU members were criticised in the tribunal's report on the incident.