A steering column device comprising: a steering column (2, 3, 4); a vehicle body mounting bracket straddling the steering column (2, 3, 4); a tilt bracket which is rotatably supported through a tilt shaft on a front end portion of the vehicle body mounting bracket; the vehicle body mounting bracket including side walls which are formed at rear end portions of the vehicle body mounting bracket, and each of which includes a tilt elongated hole through which a clamping shaft of a lock mechanism is inserted, the steering column (2, 3, 4) including a distance portion which is sandwiched between the side walls of the vehicle body mounting bracket, and which includes first telescopic elongated holes through which the clamping shaft is inserted, the lock mechanism including the clamping shaft, and being arranged to lock or unlock a tilt operation and a telescopic operation of the steering column (2, 3, 4), the steering column (2, 3, 4) including a bottom wall portion which is formed on a front side of the first telescopic elongated hole, and which confronts a lower wall portion of the tilt bracket, a telescopic guide mechanism disposed between the lower wall portion of the tilt bracket and the bottom wall portion of the steering column (2, 3, 4), characterized in that the telescopic guide mechanism includes a second telescopic elongated hole formed in one of the lower wall portion of the tilt bracket and the bottom wall portion of the steering column (2, 3, 4), and a sliding guide member which is provided to the other of the lower wall portion of the tilt bracket and the bottom wall portion of the steering column (2, 3, 4) which does not include the second telescopic elongated hole, whose a portion confronts the second telescopic elongated hole, and which elastically sandwiches an edge portion of the second telescopic elongated hole in the upward and downward directions. a steering column (2, 3, 4); a vehicle body mounting bracket straddling the steering column (2, 3, 4); a tilt bracket which is rotatably supported through a tilt shaft on a front end portion of the vehicle body mounting bracket; the vehicle body mounting bracket including side walls which are formed at rear end portions of the vehicle body mounting bracket, and each of which includes a tilt elongated hole through which a clamping shaft of a lock mechanism is inserted, the steering column (2, 3, 4) including a distance portion which is sandwiched between the side walls of the vehicle body mounting bracket, and which includes first telescopic elongated holes through which the clamping shaft is inserted, the lock mechanism including the clamping shaft, and being arranged to lock or unlock a tilt operation and a telescopic operation of the steering column (2, 3, 4), the steering column (2, 3, 4) including a bottom wall portion which is formed on a front side of the first telescopic elongated hole, and which confronts a lower wall portion of the tilt bracket, a telescopic guide mechanism disposed between the lower wall portion of the tilt bracket and the bottom wall portion of the steering column (2, 3, 4), characterized in that the telescopic guide mechanism includes a second telescopic elongated hole formed in one of the lower wall portion of the tilt bracket and the bottom wall portion of the steering column (2, 3, 4), and a sliding guide member which is provided to the other of the lower wall portion of the tilt bracket and the bottom wall portion of the steering column (2, 3, 4) which does not include the second telescopic elongated hole, whose a portion confronts the second telescopic elongated hole, and which elastically sandwiches an edge portion of the second telescopic elongated hole in the upward and downward directions.