A steering system includes a column jacket including a lower jacket and an upper jacket; an engagement member; a retaining member; and a buffer member that is retained by the retaining member and contacts the engagement member in a contact direction at a time when the upper jacket is displaced to one sliding end. The retaining member includes a support surface that supports the buffer member; paired holding portions that are respectively disposed on both sides of the buffer member in a circumferential direction of the upper jacket and hold the buffer member toward the support surface; and a restriction portion configured to be engaged with an end of the buffer member on a side toward which an opposite direction is directed, so as to restrict movement of the buffer member in the opposite direction, the opposite direction being opposite to the contact direction.