Brunei Darussalam participated in the 2005 Southeast Asian Games held in multiple venues in the Philippines from November 27, 2005 to December 5, 2005. The chief of mission to the games was Japar Bangkol. It won 1 gold, 3 silver and 2 bronze medals at the games.

Medalists MedalNameSportEvent PG Moh Salfh Chuchu PG HJ Tuah Haji Naim Brahim Lokman Mohammad Salleh Lawn bowls Men's triples Haji Tengah Masdiana Karate Men's individual kumite (< 55 kg.) Sim Chung Hlang Karate Men's individual kumite (< 70 kg.) Tong Kit Siong Karate Men's individual kumite (< 75 kg.)

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