Errol Fraser Brain (born 21 July 1968) is a former New Zealand rugby union player and a current coach. He played as back-row/number 8. Brain had more than 100 caps for Counties Manukau. He played for Auckland Blues (1996) and Waikato Chiefs (1997/98), in New Zealand, and Valence d'Agen (1993), in France. He moved to Toyota Motor Company, in Japan, where he played from 1999 to 2002. Brain played for New Zealand Māori, from 1989 to 1998, and was also their captain.