Roberto Durán Samaniego (born June 16, 1951) is a Panamanian former professional boxer who competed from 1968 to 2001. 

Durán ended his career with a professional record of 119 fights, 103 wins, and 70 knockouts. 

He held world championships in four weight classes: Lightweight, welterweight, light middleweight and middleweight. Duran also reigned as the undisputed and lineal lightweight champion and the lineal welterweight champion.

Durán won his first 31 consecutive professional fights, and scored knockout victories over future Featherweight Champion Ernesto Marcel and former Super Featherweight Champion Hiroshi Kobayashi. 

Culminating in his first title bout in June 1972, where he defeated Ken Buchanan in Madison Square Garden for the WBA Lightweight Championship.

He is also the second boxer to have competed over a span of five decades, the first being Jack Johnson. Durán was known as a versatile, technical brawler and pressure fighter, which earned him the nickname "Manos de Piedra" ("Hands of Stone") for his formidable punching power and excellent defense.

In 2002, Durán was voted by The Ring magazine as the fifth greatest fighter of the last 80 years, while boxing historian Bert Sugar rated him as the eighth greatest fighter of all time. The Associated Press voted him as the best lightweight of the 20th century, with many considering him the greatest lightweight of all time. 

Durán retired for good in January 2002 at age 50, following a car crash in Argentina in October 2001, after which he had required life saving surgery. He had previously retired in November 1980, June 1984 and August 1998, only to change his mind. 

From May 1971 up until his second fight against Sugar Ray Leonard in November 1980, as well as in his fight against Wilfred Benítez in January 1982, Durán was trained by legendary boxing trainer Ray Arcel.