A sliding accessory (200; 300; 1200; 1300) for a stroller, comprising: - a baseplate (210; 1210), having an elongated shape along a first axis (X-X) and presenting first and second sides which are opposite each other according to a second axis (Z-Z) perpendicular to the first axis, the baseplate being provided, on the first side of the baseplate, with a snow sliding face (210A; 1210A) which is intended to be applied against a snow-covered ground, and - a shoe (220; 1220), which is carried by the baseplate (210; 1210), being arranged on the second side of the baseplate, and which is able to be removably attached to a wheel of the stroller, wherein the shoe (220; 1220) defines a housing (221; 1221) for receiving a lower portion of the wheel, which housing is open, according to the second axis (Z-Z), in the opposite direction to the first side of the baseplate (210; 1210) and which housing is fixedly delimited by a bottom wall (222; 1222), which is arranged transversely to the second axis (Z-Z), and by two side walls (223; 1223) which are arranged substantially parallel to the first axis (X-X) and to the second axis (Z-Z), being arranged facing each other according to a third axis (Y-Y) which is perpendicular to the first and second axes, wherein each of the two side walls (223; 1223) is provided with a relief (224; 1224) which projects from the remainder of the corresponding side wall toward the other side wall according to the third axis (Y-Y), and wherein said reliefs (224; 1224) are jointly arranged to cooperate by contact with a tire of the wheel so as, by relative displacement between the sliding accessory and the wheel according to the second axis (Z-Z), to pass the sliding accessory reversibly between: - an operational configuration, in which the reliefs (224; 1224) press the tire against the bottom wall (222; 1222) according to the second axis (Z-Z) so as to wedge a lower portion of the tire in the lower part of the housing (221; 1221) to attach the sliding accessory to the wheel, and - an inoperative configuration, in which the sliding accessory is detached from the wheel, the tire being elastically compressed by the reliefs according to the third axis (Y-Y) during the transition of the sliding accessory between the operational and inoperative configurations. - a baseplate (210; 1210), having an elongated shape along a first axis (X-X) and presenting first and second sides which are opposite each other according to a second axis (Z-Z) perpendicular to the first axis, the baseplate being provided, on the first side of the baseplate, with a snow sliding face (210A; 1210A) which is intended to be applied against a snow-covered ground, and - a shoe (220; 1220), which is carried by the baseplate (210; 1210), being arranged on the second side of the baseplate, and which is able to be removably attached to a wheel of the stroller, wherein the shoe (220; 1220) defines a housing (221; 1221) for receiving a lower portion of the wheel, which housing is open, according to the second axis (Z-Z), in the opposite direction to the first side of the baseplate (210; 1210) and which housing is fixedly delimited by a bottom wall (222; 1222), which is arranged transversely to the second axis (Z-Z), and by two side walls (223; 1223) which are arranged substantially parallel to the first axis (X-X) and to the second axis (Z-Z), being arranged facing each other according to a third axis (Y-Y) which is perpendicular to the first and second axes, wherein each of the two side walls (223; 1223) is provided with a relief (224; 1224) which projects from the remainder of the corresponding side wall toward the other side wall according to the third axis (Y-Y), and wherein said reliefs (224; 1224) are jointly arranged to cooperate by contact with a tire of the wheel so as, by relative displacement between the sliding accessory and the wheel according to the second axis (Z-Z), to pass the sliding accessory reversibly between: - an operational configuration, in which the reliefs (224; 1224) press the tire against the bottom wall (222; 1222) according to the second axis (Z-Z) so as to wedge a lower portion of the tire in the lower part of the housing (221; 1221) to attach the sliding accessory to the wheel, and - an inoperative configuration, in which the sliding accessory is detached from the wheel, the tire being elastically compressed by the reliefs according to the third axis (Y-Y) during the transition of the sliding accessory between the operational and inoperative configurations. - an operational configuration, in which the reliefs (224; 1224) press the tire against the bottom wall (222; 1222) according to the second axis (Z-Z) so as to wedge a lower portion of the tire in the lower part of the housing (221; 1221) to attach the sliding accessory to the wheel, and - an inoperative configuration, in which the sliding accessory is detached from the wheel, the tire being elastically compressed by the reliefs according to the third axis (Y-Y) during the transition of the sliding accessory between the operational and inoperative configurations.