Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The men's 400 metres event was part of the track and field athletics programme at the 1924 Summer Olympics. The competition was held on Thursday, July 10, 1924 and on Friday, July 11, 1924. As for all other races the track was 500 metres in circumference. Sixty runners from 27 nations competed. In the quarter-finals, Josef Imbach set a new Olympic record with 48.0 seconds. In the semi-finals Horatio Fitch improved the Olympic record with 47.8 seconds. In the final, Eric Liddell set a new world record with 47.6 seconds; this time was ratified as a 400 metres world record as Ted Meredith ran his record over 440 yards.