Horacio Enrique Accavallo (14 October 1934 – 14 September 2022) was an Argentine professional boxer who competed from 1956 until 1967.

On 1 March 1966, he won the vacant WBA & WBC world flyweight championship by outpointing Katsuyoshi Takayama on 15-round split decision in Tokyo, Japan.

[1][2][3][4][5] Accavallo had been the second contender for the world flyweight title held by Salvatore Burruni.

The WBA & WBC had mandated that Burruni fight Hiroyuki Ebihara (the first contender).

The WBA & WBC stripped the champion of his crown and sanctioned the Accavallo - Katsuyoshi Takayama (the third contender) match for the title.

Al Diaz (Philippines) Champion: Horacio Accavallo (Argentina) 1.