A steering column device comprising: a steering shaft capable of mounting a steering wheel to a vehicle body rear side; a steering column configured to rotatably pivotally support the steering shaft; a vehicle body mounting bracket having a flange part, which has a notch groove (6, 94) formed thereon and opening towards the vehicle body rear side, and integrally provided with the steering column; and a release capsule configured to releasably fix the vehicle body mounting bracket to the vehicle body, wherein the vehicle body mounting bracket is configured to support the steering column to the vehicle body by fixing of the flange part to the vehicle body and to move towards a vehicle body front side and to release from the vehicle body together with the steering column upon a secondary collision, and wherein the release capsule comprises: a sleeve having a through-hole (73, 78) for inserting therein a fastening member configured to fix the vehicle body mounting bracket to the vehicle body and to be arranged in the notch groove (6, 94); a sliding plate having a hole formed thereon, in which the sleeve is to be inserted, and configured to sandwich the vehicle body mounting bracket; and an fixing part (75, 77) and a lock member each provided at an end portion and the other end portion of the sleeve so as to sandwich the sliding plate and the vehicle body mounting bracket, wherein the sleeve comprises a male screw formed on a cylindrical part thereof, wherein the male screw of the sleeve is configured to be screwed with a female screw formed at a round hole (81, 93) of the lock member, and the desired release load is adjusted by tightening torque of the lock member, wherein the fixing part (75, 77) is provided to be in contact with the vehicle body; and the fixing part (75, 77) is disposed at a side facing the vehicle body, and the lock member is disposed at a side facing away from the vehicle body. a steering shaft capable of mounting a steering wheel to a vehicle body rear side; a steering column configured to rotatably pivotally support the steering shaft; a vehicle body mounting bracket having a flange part, which has a notch groove (6, 94) formed thereon and opening towards the vehicle body rear side, and integrally provided with the steering column; and a release capsule configured to releasably fix the vehicle body mounting bracket to the vehicle body, wherein the vehicle body mounting bracket is configured to support the steering column to the vehicle body by fixing of the flange part to the vehicle body and to move towards a vehicle body front side and to release from the vehicle body together with the steering column upon a secondary collision, and wherein the release capsule comprises: a sleeve having a through-hole (73, 78) for inserting therein a fastening member configured to fix the vehicle body mounting bracket to the vehicle body and to be arranged in the notch groove (6, 94); a sliding plate having a hole formed thereon, in which the sleeve is to be inserted, and configured to sandwich the vehicle body mounting bracket; and an fixing part (75, 77) and a lock member each provided at an end portion and the other end portion of the sleeve so as to sandwich the sliding plate and the vehicle body mounting bracket, a sleeve having a through-hole (73, 78) for inserting therein a fastening member configured to fix the vehicle body mounting bracket to the vehicle body and to be arranged in the notch groove (6, 94); a sliding plate having a hole formed thereon, in which the sleeve is to be inserted, and configured to sandwich the vehicle body mounting bracket; and an fixing part (75, 77) and a lock member each provided at an end portion and the other end portion of the sleeve so as to sandwich the sliding plate and the vehicle body mounting bracket, wherein the sleeve comprises a male screw formed on a cylindrical part thereof, wherein the male screw of the sleeve is configured to be screwed with a female screw formed at a round hole (81, 93) of the lock member, and the desired release load is adjusted by tightening torque of the lock member, wherein the fixing part (75, 77) is provided to be in contact with the vehicle body; and the fixing part (75, 77) is disposed at a side facing the vehicle body, and the lock member is disposed at a side facing away from the vehicle body.