A steering system comprising: a steering shaft to which a steering member is coupled at an end of the steering shaft (39 and which can extend and contract in an axial direction; a column jacket having an upper jacket that is located near the steering member in the axial direction and holds the steering shaft and a lower jacket that is located away from the steering member in the axial direction and holds the steering shaft, the column jacket being enabled to extend and contract in the axial direction along with the steering shaft as a result of movement of the upper jacket with respect to the lower jacket; a bracket (5, 6) that supports the lower jacket and that is fixed to a vehicle body; an operation member that is operated to restrict extension and contraction of the column jacket; and a pair of first tooth rows including a plurality of first teeth, the first teeth each having a tooth trace extending in a crossing direction crossing the axial direction, the first teeth being arranged at a predetermined pitch in the axial direction, the first tooth rows extending parallel to each other and being movable integrally with the upper jacket in the axial direction; characterized by a tooth member including a block-like body portion supported by the lower jacket and a pair of second teeth provided on a pair of side surfaces (85A, 85B) of the body portion, the side surfaces (85A, 85B) extending parallel to each other such that at least one second tooth is provided on each of the side surfaces(85A, 85B), the tooth member being shaped by compression molding and moving in accordance with operation of the operation member to allow the second teeth to mesh with the respective first tooth rows, wherein the second teeth have tooth tips (86A, 86B) displaced from each other by a distance shorter than the predetermined pitch. a steering shaft to which a steering member is coupled at an end of the steering shaft (39 and which can extend and contract in an axial direction; a column jacket having an upper jacket that is located near the steering member in the axial direction and holds the steering shaft and a lower jacket that is located away from the steering member in the axial direction and holds the steering shaft, the column jacket being enabled to extend and contract in the axial direction along with the steering shaft as a result of movement of the upper jacket with respect to the lower jacket; a bracket (5, 6) that supports the lower jacket and that is fixed to a vehicle body; an operation member that is operated to restrict extension and contraction of the column jacket; and a pair of first tooth rows including a plurality of first teeth, the first teeth each having a tooth trace extending in a crossing direction crossing the axial direction, the first teeth being arranged at a predetermined pitch in the axial direction, the first tooth rows extending parallel to each other and being movable integrally with the upper jacket in the axial direction; characterized by a tooth member including a block-like body portion supported by the lower jacket and a pair of second teeth provided on a pair of side surfaces (85A, 85B) of the body portion, the side surfaces (85A, 85B) extending parallel to each other such that at least one second tooth is provided on each of the side surfaces(85A, 85B), the tooth member being shaped by compression molding and moving in accordance with operation of the operation member to allow the second teeth to mesh with the respective first tooth rows, wherein the second teeth have tooth tips (86A, 86B) displaced from each other by a distance shorter than the predetermined pitch.