The Olympic Oath (distinct from the Olympic creed) is a solemn promise made by one athlete, judge or official, and one coach at the Opening Ceremony of each Olympic Games. Each oath taker is from the host nation and takes the oath on behalf of all athletes, officials, or coaches at the Games. The athletes' oath was first introduced for the 1920 Summer Olympic Games, with oaths for the officials and coaches added in 1972 and 2010. The oath is usually said in the language of the nation which is hosting the games; however, in 1994 both the athletes' and officials' oaths were said in English. Until the 1984 games the oath takers swore upon their nation's flag; since then all have taken the oath whilst holding the Olympic Flag. All three of the oaths were combined into one beginning at the 2018 Winter Games.
The inspiration for an oath came from the Ancient Olympic Games where competitors swore on a statue of Zeus. An oath for the athletes was first thought of in 1906, following unsportsmanlike incidents. An athletes' oath was introduced for the 1920 games and Victor Boin was the first person to take the oath on behalf of all athletes. Giuliana Minuzzo was the first woman to take the athletes' oath at the winter games in 1956, while Heidi Schuller did likewise at the Summer Olympics in 1972. The first Olympic Champion to take the oath was Rudolf Ismayr, who took it at the 1936 Games. The only occasion where more than one person has said an oath occurred at the 1988 Summer Olympics when Hur Jae and Shon Mi-Na took the athletes' oath together, until 2021 when rules around gender equality decreed that each oath would be taken by a man and a woman. The oath has changed over the years to remove nationalism and to reflect drugs in sport and equality.
An oath for the officials was first discussed in the 1950s. It was not, however, until 1970 that the International Olympic Committee (IOC) voted to include an oath of the officials as well as athletes at the Olympic Games. The first oath for the officials was taken by Fumio Asaki at the 1972 Winter Olympic Games. When the Youth Olympics were created the IOC decided to have an oath for coaches as they realised that young athletes look to them particularly. This was introduced into the adult games for the 2012 edition.