The 2004 Men's Pan American Cup was the second edition of the Men's Pan American Cup, the quadrennial men's international field hockey championship of the Americas organized by the Pan American Hockey Federation. It was held between 12 and 23 May 2004 in London, Ontario, Canada. The tournament doubled as the qualifier to the 2006 World Cup to be held in Mönchengladbach, Germany. The winner would qualify directly while the runner-up would have the chance to obtain one of five berths at the World Cup Qualifier in Changzhou, China.