A device for removably fixing a strand of a wristband to a watch case, which comprises: - A strand of a wristband comprising an end intended for fixing removably to a watch case, comprising a projection arranged at said end, said projection being intended to become lodged within a groove of a watch case, and comprising at least one vertical opening arranged in the thickness of said projection of the strand of the wristband and comprising an elastic element positioned at least partially facing the at least one vertical opening, so as to be able to accept a pin through the elastic element and through at least part of the length of said at least one vertical opening, the elastic element being an element able to hold the strand of a wristband on a watch case with minimal clearance using a pin, this elastic element being chosen from a snap ring, a polymer seal, of U-shaped or T-shaped cross section, an O-ring, a four-lobed ring or a spring washer, notably a metal foil; - at least said groove parallel to the plane of the frame of the watch case arranged on the periphery of the watch case, notably arranged on the periphery of a middle of the watch case, delimited by an upper surface and a lower surface which are parallel to the plane of the frame of the watch case, said groove being able to accept a projection positioned at the end of the strand of a wristband; - at least one watch case opening passing vertically through one of the lower or upper surfaces delimiting the at least one groove of the watch case, so that this at least one opening is substantially aligned with the at least one vertical opening of the strand of the wristband, when the latter is fixed; - at least one pin able to become lodged through said elastic element, arranged within the watch case or within the strand of a wristband to correspond with the respective openings (7, 17) thereof, through a part of the at least one vertical opening of the strand of a wristband and through said at least one watch case opening to guarantee the holding of the strand of a wristband on the watch case, characterized in that the elastic element is housed removably in a housing arranged at the lower or upper surface of the strand of a wristband, extending substantially in a plane parallel to the plane of the strand of a wristband. - A strand of a wristband comprising an end intended for fixing removably to a watch case, comprising a projection arranged at said end, said projection being intended to become lodged within a groove of a watch case, and comprising at least one vertical opening arranged in the thickness of said projection of the strand of the wristband and comprising an elastic element positioned at least partially facing the at least one vertical opening, so as to be able to accept a pin through the elastic element and through at least part of the length of said at least one vertical opening, the elastic element being an element able to hold the strand of a wristband on a watch case with minimal clearance using a pin, this elastic element being chosen from a snap ring, a polymer seal, of U-shaped or T-shaped cross section, an O-ring, a four-lobed ring or a spring washer, notably a metal foil; - at least said groove parallel to the plane of the frame of the watch case arranged on the periphery of the watch case, notably arranged on the periphery of a middle of the watch case, delimited by an upper surface and a lower surface which are parallel to the plane of the frame of the watch case, said groove being able to accept a projection positioned at the end of the strand of a wristband; - at least one watch case opening passing vertically through one of the lower or upper surfaces delimiting the at least one groove of the watch case, so that this at least one opening is substantially aligned with the at least one vertical opening of the strand of the wristband, when the latter is fixed; - at least one pin able to become lodged through said elastic element, arranged within the watch case or within the strand of a wristband to correspond with the respective openings (7, 17) thereof, through a part of the at least one vertical opening of the strand of a wristband and through said at least one watch case opening to guarantee the holding of the strand of a wristband on the watch case, characterized in that the elastic element is housed removably in a housing arranged at the lower or upper surface of the strand of a wristband, extending substantially in a plane parallel to the plane of the strand of a wristband.