A steering column device comprising: an outer column configured to be attached to a vehicle body; an inner column provided to be movable in a vehicle body front-rear direction with respect to the outer column and configured to rotatably support a steering shaft; an electric actuator provided in one of the outer column and the inner column and configured to move the inner column in the vehicle body front-rear direction; and a driving member configured to transmit a driving force of the electric actuator to another of the outer column and the inner column, wherein the driving member includes a first protrusion and a second protrusion provided at an interval from each other along a moving direction of the inner column with respect to the outer column, the other of the outer column and the inner column includes an engaging hole into which the first protrusion is inserted and fixed, and a long hole elongated along the moving direction of the inner column, and characterized In that the long hole includes an expanded section (7b1) located at an end portion on the engaging hole side, the second protrusion being inserted into the expanded section (7b1), and a sliding resistance section (7b2) formed continuously to an opposite side of the engaging hole with respect to the expanded section (7b1), a width in an orthogonal direction orthogonal to the moving direction of the expanded section (7b1) is larger than or equal to a width in the orthogonal direction of the second protrusion, and a width in the orthogonal direction of the sliding resistance section (7b2) is smaller than the width in the orthogonal direction of the second protrusion, and the first protrusion is pressed against the engaging hole and sheared when the inner column receives an impact load toward a vehicle body forward direction, and the second protrusion enters from the expanded section (7b1) of the long hole to the sliding resistance section (7b2), and relatively moves in the sliding resistance section (7b2) of the long hole while being elastically deformed and receiving sliding frictional resistance toward the vehicle body front-rear direction when the inner column receives the impact load toward the vehicle body forward direction. an outer column configured to be attached to a vehicle body; an inner column provided to be movable in a vehicle body front-rear direction with respect to the outer column and configured to rotatably support a steering shaft; an electric actuator provided in one of the outer column and the inner column and configured to move the inner column in the vehicle body front-rear direction; and a driving member configured to transmit a driving force of the electric actuator to another of the outer column and the inner column, wherein the driving member includes a first protrusion and a second protrusion provided at an interval from each other along a moving direction of the inner column with respect to the outer column, the other of the outer column and the inner column includes an engaging hole into which the first protrusion is inserted and fixed, and a long hole elongated along the moving direction of the inner column, and characterized In that the long hole includes an expanded section (7b1) located at an end portion on the engaging hole side, the second protrusion being inserted into the expanded section (7b1), and a sliding resistance section (7b2) formed continuously to an opposite side of the engaging hole with respect to the expanded section (7b1), a width in an orthogonal direction orthogonal to the moving direction of the expanded section (7b1) is larger than or equal to a width in the orthogonal direction of the second protrusion, and a width in the orthogonal direction of the sliding resistance section (7b2) is smaller than the width in the orthogonal direction of the second protrusion, and the first protrusion is pressed against the engaging hole and sheared when the inner column receives an impact load toward a vehicle body forward direction, and the second protrusion enters from the expanded section (7b1) of the long hole to the sliding resistance section (7b2), and relatively moves in the sliding resistance section (7b2) of the long hole while being elastically deformed and receiving sliding frictional resistance toward the vehicle body front-rear direction when the inner column receives the impact load toward the vehicle body forward direction.