At international level, Bulgarelli represented Italy at the 1960 Summer Olympics in Rome, where the team finished in fourth place, and in two FIFA World Cups; he made his senior international debut at the 1962 edition of the tournament, and marked the occasion with two goals, becoming Italy's youngest ever World Cup goalscorer.
At the international level, Bulgarelli represented Italy in the 1960 Summer Olympics in Rome, where they placed fourth, and in two FIFA World Cups; he made his senior national team debut at the 1962 World Cup, scoring two goals to become Italy's youngest ever World Cup scorer.