Abstract: Disclosed is a rack-pinion type steering apparatus. According to the present invention, since air can flow into the interior of a gearbox from the exterior of the gearbox, unlike in the conventional structure in which an internal air flow into the gearbox is blocked at a portion of a rack-pinion type steering apparatus connected with the gearbox through a rack housing and a bellows, a problem of increasing internal pressure of the bellows in a predetermined case can be solved, and accordingly, generation of noise due to the collision between an inner peripheral surface of the bellows and an inner ball joint can be prevented.