A height adjusting apparatus of a suction body for use in an upright vacuum cleaner is disclosed. The apparatus adjusts a distance between a rotary brush and a surface to be cleaned, and includes a lifting unit pivotably disposed to the suction body, and an actuating unit disposed in a modularized state at the rear of the suction body, so that a portion thereof is exposed to the outside from the suction body, and lifting or lowering the lifting unit as the portion thereof is repeatedly pushed by a user.