A steering system (1; 100) comprising: a stationary bracket (18; 118) including a pair of stationary side plates (29L; 29R) fixed to a vehicle body, a tilt slot (36L; 36R) being formed in each of the stationary side plates (29L; 29R); a steering column by which a steering shaft having one end to which a steering member is coupled is rotatably supported, and that is tiltable about a tilt-center shaft; a movable bracket including a pair of movable side plates (22L; 22R) fixed to the steering column, an insertion slot (28L; 28R) being formed in each of the movable side plates (22L; 22R); and a fastening mechanism including a fastening shaft passed through the tilt slots (36L; 36R) and the insertion slots (28L; 28R), and a pair of fastening members (40; 160) that are supported by the fastening shaft and that fasten the corresponding stationary side plates (29L; 29R) from outside, the fastening mechanism achieving tilt lock by pressing the stationary side plates (29L; 29R) against the corresponding movable side plates (22L; 22R); wherein each of the fastening members (40; 160) includes a first fastening portion (41; 161) and a second fastening portion (42; 162) that respectively fasten a first edge portion (36L1; 36R1) and a second edge portion (36L2; 36R2) of the corresponding stationary side plate (29L; 29R), the first edge portion (36L1, 36R1) being located on a steering member side of the tilt slot (36L; 36R) and the second edge portion (36L2; 36R2) being located on an opposite side of the tilt slot (36L; 36R) from the first edge portion (36L1; 36R1); wherein the fastening mechanism includes a movable tooth row (91; 191) provided in the first fastening portion (41; 161) of the fastening member (40; 160) that fastens the stationary side plate (29L; 29R) in which the stationary tooth row (81; 181) is provided; and characterized in that the fastening mechanism includes a stationary tooth row (81; 181) that is provided only in the first edge portion (36L1; 36R1) located adjacent to the tilt slot (36L; 36R) in one of the pair of stationary side plates (29L; 29R), as a portion formed integrally with the corresponding stationary side plate (29L; 29R) or as a portion formed separately from the corresponding stationary side plate (29L; 29R); wherein, teeth of the movable tooth row (90; 190) are engaged with teeth of the stationary tooth row (80; 180). a stationary bracket (18; 118) including a pair of stationary side plates (29L; 29R) fixed to a vehicle body, a tilt slot (36L; 36R) being formed in each of the stationary side plates (29L; 29R); a steering column by which a steering shaft having one end to which a steering member is coupled is rotatably supported, and that is tiltable about a tilt-center shaft; a movable bracket including a pair of movable side plates (22L; 22R) fixed to the steering column, an insertion slot (28L; 28R) being formed in each of the movable side plates (22L; 22R); and a fastening mechanism including a fastening shaft passed through the tilt slots (36L; 36R) and the insertion slots (28L; 28R), and a pair of fastening members (40; 160) that are supported by the fastening shaft and that fasten the corresponding stationary side plates (29L; 29R) from outside, the fastening mechanism achieving tilt lock by pressing the stationary side plates (29L; 29R) against the corresponding movable side plates (22L; 22R); wherein each of the fastening members (40; 160) includes a first fastening portion (41; 161) and a second fastening portion (42; 162) that respectively fasten a first edge portion (36L1; 36R1) and a second edge portion (36L2; 36R2) of the corresponding stationary side plate (29L; 29R), the first edge portion (36L1, 36R1) being located on a steering member side of the tilt slot (36L; 36R) and the second edge portion (36L2; 36R2) being located on an opposite side of the tilt slot (36L; 36R) from the first edge portion (36L1; 36R1); wherein the fastening mechanism includes a movable tooth row (91; 191) provided in the first fastening portion (41; 161) of the fastening member (40; 160) that fastens the stationary side plate (29L; 29R) in which the stationary tooth row (81; 181) is provided; and characterized in that the fastening mechanism includes a stationary tooth row (81; 181) that is provided only in the first edge portion (36L1; 36R1) located adjacent to the tilt slot (36L; 36R) in one of the pair of stationary side plates (29L; 29R), as a portion formed integrally with the corresponding stationary side plate (29L; 29R) or as a portion formed separately from the corresponding stationary side plate (29L; 29R); wherein, teeth of the movable tooth row (90; 190) are engaged with teeth of the stationary tooth row (80; 180).