Valentín Antonio Beperet Madariaga (18 December 1926 – 21 February 1989) was a Chilean footballer who played as a left-back.

A left-back, Beperet is a product of Magallanes youth system.

[6] He played in one match for the Chile national football team in 1953.

[8] After his retirement, he developed a coaching career, leading clubs such as Municipal de Santiago [es] and Iberia-Puente Alto in the Chilean second division.

[2][3] He had a friendship with the also footballer Aurelio Vásquez, to whom he nicknamed Toscano (Tuscan) like the Argentine actor Toscanito [es] (Little Tuscan), who performed a goalkeeper in the 1948 film Pelota de trapo [es] (Rag ball) what they had seen.