Athletics at the 1924 Summer Olympics – Men's 400 metres hurdles

This was the fifth time the event was held. It had been introduced along with the men's 200 metres hurdles in 1900, with the 200 being dropped after 1904 and the 400 being held through 1908 before being left off the 1912 programme. However, when the Olympics returned in 1920 after World War I, the men's 400 metres hurdles was back and would continue to be contested at every Games thereafter.

One of the six finalists from the 1920 Games returned: fourth-place finisher Géo André of France. The event, a very unusual one before 1920, was becoming more common; the AAU had added it to its programme. Morgan Taylor was the AAU champion and U.S. trials winner.[2]

Argentina, Chile, Denmark, Greece, and Italy each made their debut in the event. The United States made its fifth appearance, the only nation to have competed at every edition of the event to that point.

The competition featured the three-round format introduced in 1908: quarterfinals, semifinals, and a final. Ten sets of hurdles were set on the course. The hurdles were 3 feet (91.5 centimetres) tall and were placed 35 metres apart beginning 45 metres from the starting line, resulting in a 40 metres home stretch after the last hurdle.

There were 6 quarterfinal heats, with between 3 and 5 athletes each. The top 2 men in each quarterfinal advanced to the semifinals. The 12 semifinalists were divided into 2 semifinals of 6 athletes each, with the top 3 in each semifinal advancing to the 6-man final.[2]

As with all other races the track was 500 metres in circumference.

These were the standing world and Olympic records (in seconds) prior to the 1924 Summer Olympics.

World record	Frank Loomis (USA)	54.0	Antwerp, Belgium	16 August 1920
Olympic record	Frank Loomis (USA)	54.0	Antwerp, Belgium	16 August 1920

Morgan Taylor won the U.S. trials in a time of 52.6 but he also knocked over a hurdle, which was against the rules in force at that time. He did the same in the final of this competition so the time he set, again 52.6, was also not ratified as world record. As the second placed Erik Wilén used a similar style his 53.8 were also not accepted as world record but tolerated as Olympic record.

• Olympic Report
• Wudarski, Pawel (1999). "Wyniki Igrzysk Olimpijskich" (in Polish). Archived from the original on 14 October 2008. Retrieved 14 October 2008.