A steering system comprising: a steering column including an outer tube and an inner tube that are fitted to each other so as to be axially slidable relative to each other, and that support a steering shaft, the steering column being tiltable around a tilt center axis; a fixing bracket including a pair of side panels opposed to each other; a movable bracket including a pair of side panels fixed to the outer tube and opposed respectively to the side panels of the fixing bracket; a lock mechanism including a lock shaft inserted through insertion holes in the side panels of the fixing bracket and insertion holes in the side panels of the movable bracket, the lock mechanism achieving locking by bringing each of the side panels of the fixing bracket into pressure contact with a corresponding one of the side panels of the movable bracket in accordance with an operation of an operation lever that is rotated together with the lock shaft; and an urging member that urges the steering column in an upward tilt direction, wherein the lock mechanism further includes a first cam (21; 21U) that is rotatable together with the lock shaft, characterized in that the lock mechanism further includes a second cam (22; 22U; 70) that has a cam shape different from a cam shape of the first cam (21; 21U), and that is rotatable together with the lock shaft, the urging member includes a locked portion locked to a fixing member, and an abutting portion that abuts on the second cam (22; 22U; 70), and at a time of locking by the lock mechanism, the first cam (21; 21U) pushes up the inner tube in the upward tilt direction through an opening in the outer tube, and the urging member pushes up the second cam (22; 70) in the upward tilt direction. a steering column including an outer tube and an inner tube that are fitted to each other so as to be axially slidable relative to each other, and that support a steering shaft, the steering column being tiltable around a tilt center axis; a fixing bracket including a pair of side panels opposed to each other; a movable bracket including a pair of side panels fixed to the outer tube and opposed respectively to the side panels of the fixing bracket; a lock mechanism including a lock shaft inserted through insertion holes in the side panels of the fixing bracket and insertion holes in the side panels of the movable bracket, the lock mechanism achieving locking by bringing each of the side panels of the fixing bracket into pressure contact with a corresponding one of the side panels of the movable bracket in accordance with an operation of an operation lever that is rotated together with the lock shaft; and an urging member that urges the steering column in an upward tilt direction, wherein the lock mechanism further includes a first cam (21; 21U) that is rotatable together with the lock shaft, characterized in that the lock mechanism further includes a second cam (22; 22U; 70) that has a cam shape different from a cam shape of the first cam (21; 21U), and that is rotatable together with the lock shaft, the urging member includes a locked portion locked to a fixing member, and an abutting portion that abuts on the second cam (22; 22U; 70), and at a time of locking by the lock mechanism, the first cam (21; 21U) pushes up the inner tube in the upward tilt direction through an opening in the outer tube, and the urging member pushes up the second cam (22; 70) in the upward tilt direction.