Adventures of Petrov and Vasechkin, Usual and Incredible (Russian: Приключения Петрова и Васечкина, обыкновенные и невероятные, romanized: Priklyucheniya Petrova i Vasechkina) is a 1983 Soviet two-part children's two-part musical comedy directed by Vladimir Alenikov. The plot tells of two friends-schoolboys, Petya Vasechkin and Vasya Petrov, about their attempts to assert themselves and about their friend, with whom they are in love, Masha Startseva.

A year later a sequel titled Vacation of Petrov and Vasechkin, Usual and Incredible was released.