Abstract: A structure of a telescopic steering apparatus for a vehicle, in which a pair of clamping numbers and a guide member for guiding the pair of clamping members to an inner tube are provided for fixing and unfixing the inner tube constituting a telescopically movable portion of a column jacket to an upper jacket constituting a fixed portion so that a rigidity of a steering shaft is improved when the telescopically movable portion of the column jacket is extended to a maximum position. In addition, a guide member and alleviator are fitted around inner and outer peripheral surfaces of the upper jacket and inner tube so that when the inner tube is drawn into the upper jacket, a shock upon collision of the inner tube and upper jacket is damped.