Juanito Rubillar (born February 22, 1977) is a Filipino former professional boxer and WBC Continental Americas light flyweight champions.

A veteran fighter, Rubillar made his professional debut on July 23, 1994, against fellow Filipino boxer Ramil Gevero.

Just like Bert Batawang, Rubillar suffered multiple losses and draws early in his career, but did not give up.

Leading with his head as much as with his gloves which is Rubillar's style, the veteran Filipino staggered Budler on a number of occasions and while referee Pete Podgorski cautioned the Filipino a couple of times for using his head, he did not penalize Rubillar.

Rubillar's promoter and boxing manager Gabriel “Bebot” Elorde (son of the legendary Flash Elorde) sayd he will file a protest with the IBO over what was widely perceived to be a hometown decision in the IBF light flyweight title eliminator.