The hammer throw is one of the four throwing events in regular track and field competitions, along with the discus throw, shot put and javelin. The "hammer" used in this sport is not like any of the tools also called by that name. It consists of a metal ball attached by a steel wire to a grip. The size of the ball varies between men's and women's competitions (see Competition section below for details).
With roots dating back to the 15th century, the contemporary version of the hammer throw is one of the oldest of Olympic Games competitions, first included at the 1900 games in Paris, France (the second Olympiad of the modern era). Its history since the late 1960s and legacy prior to inclusion in the Olympics have been dominated by European and Eastern European influence, which has affected interest in the event in other parts of the world.
The hammer evolved from its early informal origins to become part of the Scottish Highland games in the late 18th century, where the original version of the event is still contested today. It is believed that, like many Highland games events, the origin of the hammer throw is tied to a prohibition by King Edward I of England against Scotsmen possessing weapons during the Wars of Scottish Independence in the late 13th and early 14th centuries.
In the absence of weapons of war, the Scots turned to alternative methods of military training. The Highland Games became a more formalized event after the Highland Clearances of the late 18th century, which were an agricultural revolution that involved forced displacement of commoners in the Scottish Highlands by the .