A steering system comprising: a steering operation shaft coupled to a steered wheel, the steering operation shaft being configured to move in an axial direction thereof so as to change an orientation of the steered wheel; a tubular housing including an insertion hole through which the steering operation shaft is disposed, the housing holding the steering operation shaft such that the steering operation shaft is movable in the axial direction; and a tubular steering operation shaft bushing interposed between an outer surface of the steering operation shaft and an inner surface of the housing in a region of the insertion hole adjacent to an axial end of the housing, the steering operation shaft bushing supporting the steering operation shaft such that the steering operation shaft is slidable in the axial direction, wherein the housing includes an annular groove on the inner surface of the housing, and the steering operation shaft bushing includes a collar protruding radially outward from substantially an entire circumference of the steering operation shaft bushing, the collar being fitted into the annular groove, a through slit passing through the steering operation shaft bushing in the axial direction, and at least one first non-through slit extending in the axial direction such that the at least one first non-through slit passes through a portion of the steering operation shaft bushing whose axial position corresponds to an axial position of the collar, the at least one first non-through slit being closed at at least one of axial ends of the steering operation shaft bushing, wherein a length measured by subtracting a sum of circumferential widths of the through slit and the at least one first non-through slit from a circumferential length of a radial outer end of the collar of the steering operation shaft bushing is smaller than a circumferential length of the inner surface of the housing. a steering operation shaft coupled to a steered wheel, the steering operation shaft being configured to move in an axial direction thereof so as to change an orientation of the steered wheel; a tubular housing including an insertion hole through which the steering operation shaft is disposed, the housing holding the steering operation shaft such that the steering operation shaft is movable in the axial direction; and a tubular steering operation shaft bushing interposed between an outer surface of the steering operation shaft and an inner surface of the housing in a region of the insertion hole adjacent to an axial end of the housing, the steering operation shaft bushing supporting the steering operation shaft such that the steering operation shaft is slidable in the axial direction, wherein the housing includes an annular groove on the inner surface of the housing, and the steering operation shaft bushing includes a collar protruding radially outward from substantially an entire circumference of the steering operation shaft bushing, the collar being fitted into the annular groove, a through slit passing through the steering operation shaft bushing in the axial direction, and at least one first non-through slit extending in the axial direction such that the at least one first non-through slit passes through a portion of the steering operation shaft bushing whose axial position corresponds to an axial position of the collar, the at least one first non-through slit being closed at at least one of axial ends of the steering operation shaft bushing, wherein a collar protruding radially outward from substantially an entire circumference of the steering operation shaft bushing, the collar being fitted into the annular groove, a through slit passing through the steering operation shaft bushing in the axial direction, and at least one first non-through slit extending in the axial direction such that the at least one first non-through slit passes through a portion of the steering operation shaft bushing whose axial position corresponds to an axial position of the collar, the at least one first non-through slit being closed at at least one of axial ends of the steering operation shaft bushing, wherein a length measured by subtracting a sum of circumferential widths of the through slit and the at least one first non-through slit from a circumferential length of a radial outer end of the collar of the steering operation shaft bushing is smaller than a circumferential length of the inner surface of the housing.