A floor panel, in particular for covering floors of cargo holds of aircraft, is formed by a plurality of milled profiles, which are friction stir welded along their longitudinal edges, with preference continuously to form longitudinal (butt) seams. The milled profiles each form a beam “of equal stress”, with an upper flange and a lower flange spaced apart from one another along their extent. The milled profiles have a double-T-shaped cross-sectional profile, the upper flanges and the lower flanges being respectively connected by webs. With preference, the milled profiles are milled out in one piece from solid material of a sufficiently tough aluminum alloy. The joining together of the floor panel including a plurality of milled profiles that are arranged in parallel and friction stir welded allows a high mechanical load-bearing capacity of the floor panel in comparison with conventional sandwich floor panels along with a comparatively low weight.