Production method of a composite-material component (10, 20, 30, 54) of a ski boot or the like; said component being a monolithic body with a shell structure (10, 20, 30, 54), that has at least one composite-material portion (12, 22, 32, 56) and at least one elastomeric-material portion (13a, 13b, 13c, 24, 34, 57) adjacent to one another; said at least one composite-material portion (12, 22, 32, 56) and said at least one elastomeric-material portion (13a, 13b, 13c, 24, 34, 57) extending for the full thickness of the monolithic body with a shell structure (10, 20, 30, 54), and being joined to one another along the edge and without interruption: said production method being characterised by comprising the steps of: - placing/laying at least a first sheet of pre-impregnated fabric onto the surface of a mould that copies in negative the shape of the monolithic body with a shell structure (10, 20, 30, 54) to be made, while leaving uncovered the area of the mould corresponding to the elastomeric-material portion (13a, 13b, 13c, 24, 34) to be made; - placing/laying a first elastomeric thermoplastic material film on the surface of the mould, in the area of the mould corresponding to the elastomeric-material portion (13a, 13b, 13c, 24, 34,) to be made, at least partially overlapping the edge of said first elastomeric thermoplastic material film and said first sheet of pre-impregnated fabric; - placing/laying a sheet of non-vulcanized rubber over said first elastomeric thermoplastic material film, in the area of the mould corresponding to the elastomeric-material portion (13a, 13b, 13c, 24, 34) to be made; - placing/laying a second elastomeric thermoplastic material film over said sheet of non-vulcanized rubber, at least partially overlapping the edge of said second elastomeric thermoplastic material film and said first sheet of pre-impregnated fabric and/or said first thermoplastic elastomer material film; and finally - extracting the air from the mould and then subjecting the mould and all its contents to a thermal baking cycle, which simultaneously causes the vulcanization of the sheet of non-vulcanized rubber and the polymerization/reticulation and hardening of the thermosetting resin of said first sheet of pre-impregnated fabric. - placing/laying at least a first sheet of pre-impregnated fabric onto the surface of a mould that copies in negative the shape of the monolithic body with a shell structure (10, 20, 30, 54) to be made, while leaving uncovered the area of the mould corresponding to the elastomeric-material portion (13a, 13b, 13c, 24, 34) to be made; - placing/laying a first elastomeric thermoplastic material film on the surface of the mould, in the area of the mould corresponding to the elastomeric-material portion (13a, 13b, 13c, 24, 34,) to be made, at least partially overlapping the edge of said first elastomeric thermoplastic material film and said first sheet of pre-impregnated fabric; - placing/laying a sheet of non-vulcanized rubber over said first elastomeric thermoplastic material film, in the area of the mould corresponding to the elastomeric-material portion (13a, 13b, 13c, 24, 34) to be made; - placing/laying a second elastomeric thermoplastic material film over said sheet of non-vulcanized rubber, at least partially overlapping the edge of said second elastomeric thermoplastic material film and said first sheet of pre-impregnated fabric and/or said first thermoplastic elastomer material film; and finally - extracting the air from the mould and then subjecting the mould and all its contents to a thermal baking cycle, which simultaneously causes the vulcanization of the sheet of non-vulcanized rubber and the polymerization/reticulation and hardening of the thermosetting resin of said first sheet of pre-impregnated fabric.