A steering column device comprising: a downward U-shaped attachment bracket fixed to a vehicle; an upward U-shaped lower jacket disposed inside a U-shaped space of the attachment bracket and supported by the attachment bracket; a polygonal cylindrical mid jacket disposed inside a U-shaped space of the lower jacket and supported by the lower jacket; a polygonal cylindrical upper jacket, of which a shape is similar to that of the mid jacket, inserted into and supported by the mid jacket so as to be able to slide; and a shock energy absorbing mechanism for absorbing a shock energy at a time of a secondary collision, characterized in that: the shock energy absorbing mechanism has a contracting guide part to smoothly perform a sliding and contracting operation of the upper jacket to the mid jacket at the time of the secondary collision separately from an energy absorbing part serving as a load generation part to absorb the shock energy, wherein the contracting guide part is formed by interposing a linear motion guide member at an overlapping part between the mid jacket and the upper jacket, linear motion guide member in which at least two rolling elements arranged in a sliding direction of the mid jacket and the upper jacket are supported by a holder, and wherein a relative position between the mid jacket and the upper jacket is regulated except for at a time of collision by a pin member which is sheared at the time of the collision. a downward U-shaped attachment bracket fixed to a vehicle; an upward U-shaped lower jacket disposed inside a U-shaped space of the attachment bracket and supported by the attachment bracket; a polygonal cylindrical mid jacket disposed inside a U-shaped space of the lower jacket and supported by the lower jacket; a polygonal cylindrical upper jacket, of which a shape is similar to that of the mid jacket, inserted into and supported by the mid jacket so as to be able to slide; and a shock energy absorbing mechanism for absorbing a shock energy at a time of a secondary collision, characterized in that: the shock energy absorbing mechanism has a contracting guide part to smoothly perform a sliding and contracting operation of the upper jacket to the mid jacket at the time of the secondary collision separately from an energy absorbing part serving as a load generation part to absorb the shock energy, wherein the contracting guide part is formed by interposing a linear motion guide member at an overlapping part between the mid jacket and the upper jacket, linear motion guide member in which at least two rolling elements arranged in a sliding direction of the mid jacket and the upper jacket are supported by a holder, and wherein a relative position between the mid jacket and the upper jacket is regulated except for at a time of collision by a pin member which is sheared at the time of the collision. the shock energy absorbing mechanism has a contracting guide part to smoothly perform a sliding and contracting operation of the upper jacket to the mid jacket at the time of the secondary collision separately from an energy absorbing part serving as a load generation part to absorb the shock energy, wherein the contracting guide part is formed by interposing a linear motion guide member at an overlapping part between the mid jacket and the upper jacket, linear motion guide member in which at least two rolling elements arranged in a sliding direction of the mid jacket and the upper jacket are supported by a holder, and wherein a relative position between the mid jacket and the upper jacket is regulated except for at a time of collision by a pin member which is sheared at the time of the collision.