Abstract: A ski boot sole for cooperating with a ski binding to releasably hold the sole in the binding, the sole having front and rear recesses with front and rear metal inserts. The front recess and the front metal insert are engaged by the front sole holder rotatable about a longitudinal axis for releasably holding the front sole holder against displacement in the forward, sideways and vertical directions. The rear recess and rear metal insert is engageable by the rear binding which is rotatable about a transverse axis. The rear sole holder butts against the portion of the fitting plate extending outside the border of the sole to secure the rear portion of the sole in the rearward, sideways and vertical directions. The front and rear metal inserts are held on the bottom of the ski boot sole by threaded inserts mounted above the sole, with screws extending through aligned holes in the metal inserts and the threaded inserts.