A steering column for preventing separation of inner column 14a and outer column 15a is provided in the state before assembly in a vehicle body or in the state after a secondary collision without requiring additional components. The steering column includes a long engaging hole 26 extending in the axial direction and provided in the upper portion of the front section of the outer column 15a. An engaging piece 28 is integrally formed with the upper portion of the rear section of the inner column 14a, and this engaging piece 28 is moved into the long engaging hole 26 so as to be able to displace along the long engaging hole 26. When assembled in a vehicle body, as the engaging piece 28 is displaced along the long engaging hole 26, both the inner column and outer column 14a, 15a are allowed to displace relative to each other within a telescopic adjustment range. In the state before being assembled in the vehicle body, the engagement between the engaging piece 28 and the front end edge of the long engaging hole 26 prevent the inner column and outer column 14a, 15a from coming apart in the axial direction.