A steering device characterized by comprising: a steering shaft including a first end to which a steering member is mounted and second end, wherein the steering shaft is telescopically adjustable in an axial direction of the steering shaft; a column jacket rotatably supporting the steering shaft and including an upper jacket positioned on a first end side and a lower jacket positioned on a second end side, wherein the column jacket is telescopically adjustable with movement of the upper jacket relative to the lower jacket in the axial direction; a lock plate fixed to the upper jacket and provided with a plurality of holes arranged in the axial direction; and a lock mechanism supported by the lower jacket and including a tooth that advances to and retreats from the lock plate, wherein: the lock mechanism moves the tooth such that the tooth advances to the lock plate to be engaged with one of the holes, and retreats from the lock plate to be disengaged from the one of the holes; the lock plate includes a bent portion as a stopper (57, 58) at an end portion (42A, 42B) of the lock plate in the axial direction; and the stopper (57, 58) restricts the movement of the upper jacket relative to the lower jacket in the axial direction by abutting on the lock mechanism in the axial direction when the steering shaft and the column jacket is telescopically adjusted. a steering shaft including a first end to which a steering member is mounted and second end, wherein the steering shaft is telescopically adjustable in an axial direction of the steering shaft; a column jacket rotatably supporting the steering shaft and including an upper jacket positioned on a first end side and a lower jacket positioned on a second end side, wherein the column jacket is telescopically adjustable with movement of the upper jacket relative to the lower jacket in the axial direction; a lock plate fixed to the upper jacket and provided with a plurality of holes arranged in the axial direction; and a lock mechanism supported by the lower jacket and including a tooth that advances to and retreats from the lock plate, wherein: the lock mechanism moves the tooth such that the tooth advances to the lock plate to be engaged with one of the holes, and retreats from the lock plate to be disengaged from the one of the holes; the lock plate includes a bent portion as a stopper (57, 58) at an end portion (42A, 42B) of the lock plate in the axial direction; and the stopper (57, 58) restricts the movement of the upper jacket relative to the lower jacket in the axial direction by abutting on the lock mechanism in the axial direction when the steering shaft and the column jacket is telescopically adjusted. the lock mechanism moves the tooth such that the tooth advances to the lock plate to be engaged with one of the holes, and retreats from the lock plate to be disengaged from the one of the holes; the lock plate includes a bent portion as a stopper (57, 58) at an end portion (42A, 42B) of the lock plate in the axial direction; and the stopper (57, 58) restricts the movement of the upper jacket relative to the lower jacket in the axial direction by abutting on the lock mechanism in the axial direction when the steering shaft and the column jacket is telescopically adjusted.