A steering-column fixing-panel assembly of a cowl crossmember comprises a pair of first and second upper panels, and a single lower panel. Each of the upper panels includes a circular groove for use in the engagement of a crossbar of the cowl crossmember, inner and outer flanges formed at opposite lateral side edges thereof, and a coupling hole formed at the front portion thereof for the fixing of a steering column. The lower panel includes a circular groove for use in the engagement of the crossbar below the first and second upper panels; a protrusion configured to engage closely, at opposite lateral side edges thereof, with the inner flanges of the first and second upper panels; lower flanges, formed at opposite lateral side edges thereof, so as to engage closely with the outer flanges of the first and second upper panels; and a pair of coupling holes, formed at the front portion thereof, so as to communicate with the coupling holes of the first and second upper panels.