A method of fabricating an in-line roller skate is provided. The in-line roller skate has a chassis (2;39) equipped with at least two rollers (3) and two platforms (4, 5; 34; 47) and a boot (1; 30). The boot has a supple upper connected to a lower panel and is capable of enclosing a wear's foot. The method includes the steps of (a) inserting a rigid insole (17; 31, 50; 55; 56) into the boot; (b) fixing fasteners between the rigid insole and the chassis, thus sandwiching the lower panel therebetween; and (c) optionally, inserting a comfort sole into the boot to cover the rigid insole.