Sole structure for a sports shoe, in particular a cross-country ski boot or telemark ski boot, the sole structure extending substantially between a connecting surface for connection to the sports shoe and a base surface for standing on a surface, with part of the base surface forming a contact surface for coming into contact with a ski, in particular a cross-country or telemark ski, or a ski binding, in particular a cross-country or telemark ski binding, comprising a structural component made of a first material, with a portion of the surface of the structural component forming the connecting surface, a coating made of a second material, the coating at least partially covering the structural component as far as the base surface, a connecting element for interacting with a holding device, in particular the ski binding, base projections extending to the base surface, the base projections being interrupted by at least one transverse groove from the base surface towards the connecting surface and lower surfaces of the base projections lying substantially in the base surface, characterised in that in a hollow-core region of the sole structure, depressions are provided in base projections, which depressions extend from the base surface towards the connecting surface and form cavities open towards the base surface, with a cavity open towards the connecting surface being formed in at least one base projection, with a lower boundary of the cavity open towards the connecting surface of the at least one base projection forming an upper boundary of the cavity open towards the base surface of the depression in the corresponding base projection. the sole structure extending substantially between a connecting surface for connection to the sports shoe and a base surface for standing on a surface, with part of the base surface forming a contact surface for coming into contact with a ski, in particular a cross-country or telemark ski, or a ski binding, in particular a cross-country or telemark ski binding, comprising a structural component made of a first material, with a portion of the surface of the structural component forming the connecting surface, a coating made of a second material, the coating at least partially covering the structural component as far as the base surface, a connecting element for interacting with a holding device, in particular the ski binding, base projections extending to the base surface, the base projections being interrupted by at least one transverse groove from the base surface towards the connecting surface and lower surfaces of the base projections lying substantially in the base surface, characterised in that in a hollow-core region of the sole structure, depressions are provided in base projections, which depressions extend from the base surface towards the connecting surface and form cavities open towards the base surface, with a cavity open towards the connecting surface being formed in at least one base projection, with a lower boundary of the cavity open towards the connecting surface of the at least one base projection forming an upper boundary of the cavity open towards the base surface of the depression in the corresponding base projection.