The present disclosure provides a steering column of a vehicle, the steering column including: a fixed gear disposed on the outer side of an inner tube, in which a steering shaft is inserted, in the axial direction of the steering column, and having a plurality of telescopic motion stop holes arranged in the axial direction of the steering column; a movable gear inserted into or separated out of the telescopic motion stop holes; an outer tube fitted on the inner tube such that the inner tube can slide in the axial direction of the steering column, and having distance members disposed at both sides of the fixed gear; a lever bolt disposed through the distance members and supporting the movable gear such that the fixed gear and the movable gear are coupled to or separated from each other when a control lever is tightened or loosened; and a load-absorbing unit comprising a guide block coupled to the outer tube and a first load-absorbing member coupled to the movable gear to be able to slide in the axial direction of the steering column on the guide block.