The Wales men’s national rugby union team represents Wales in men's international rugby union. Its governing body, the Welsh Rugby Union (WRU), was established in 1881, the same year that Wales played their first international against England. The team plays its home matches at the Millennium Stadium in Cardiff (currently known for sponsorship reasons as the Principality Stadium), which replaced Cardiff Arms Park as the national stadium of Wales in 1999.

Wales has competed annually in the Six Nations Championship (previously the Home Nations Championship and Five Nations Championship) since it was established in 1883. They have won the tournament (and its predecessors) outright 28 times, most recently in 2021. Since the Six Nations was formed in 2000, Wales have won six Six Nations titles, including four Grand Slams and finished bottom once. Wales has also participated in every Rugby World Cup since the competition was established in 1987; they finished third in the inaugural tournament and have since made two semi-finals, in 2011 and 2019. Wales were the host nation for the 1999 Rugby World Cup, although matches were also played in England, Scotland, Ireland and France.