A steering-column apparatus minimizes the force required for expanding or contracting the portion where an inner column fits and is supported and improves the ease of operation for adjusting the position of a steering wheel. A split is provided in the bottom surface of the front section of an outer column includes a main slit section in the axial direction and a sub slit section in the circumferential direction, with the front-end section of the main slit section being open on the edge on the rear side thereof. The length from the main slit section to one end section in the circumferential direction of both end sections in the circumferential direction of the sub slit section, is longer than the length from the main slit section to the other end section in the circumferential direction.