An object carrier for a motorcycle that is removable and fixable to said motorcycle, wherein said carrier comprises a first support for an object and a second support, wherein said second support supports said first support, wherein said second support is mounted with said first support in a separable way by means of a first coupling and release system and in a fixed way by means of a first fixing means, wherein said second support is adapted to be mounted with said motorcycle, wherein said first coupling and release system comprises a first group of elements mounted with said first support and a second group of elements mounted with said second support, characterized in that said first group of elements comprises a flexible ring comprising a plurality of locking teeth that project elastically towards the inside of said flexible ring, wherein said first group of elements comprises an annular connection element comprising an annular guide that rotatably mounts said flexible ring, an annular housing that hollows out said annular connection element and a central protuberance that rises from said annular housing, wherein said second group of elements comprises an annular portion having as a base an upper base of said second support, said annular portion comprises an upper end that comprises an annular flange, wherein said annular portion is a cylinder comprising a cavity at the centre thereof, wherein said annular portion is adapted to be housed within said annular housing, said central protuberance is adapted to be housed within said central cavity of said annular portion, wherein said locking teeth can be retracted into the annular connection element, wherein said locking teeth are adapted to pass from a retracted position within said annular connection element to an extracted position for engaging with said annular flange for creating a coupling of said first support with said second support, wherein said first group of elements comprises an upper through hole hollowed out within said central protuberance, wherein said second group of elements comprises a lower hole corresponding to said upper through hole, wherein said lower hole is hollowed out within said upper base of said second support, wherein said first fixing means is adapted to be fixed within the upper through hole and within the lower through hole so as to fix said first support to said second support. wherein said carrier comprises a first support for an object and a second support, wherein said second support supports said first support, wherein said second support is mounted with said first support in a separable way by means of a first coupling and release system and in a fixed way by means of a first fixing means, wherein said second support is adapted to be mounted with said motorcycle, wherein said first coupling and release system comprises a first group of elements mounted with said first support and a second group of elements mounted with said second support, characterized in that said first group of elements comprises a flexible ring comprising a plurality of locking teeth that project elastically towards the inside of said flexible ring, wherein said first group of elements comprises an annular connection element comprising an annular guide that rotatably mounts said flexible ring, an annular housing that hollows out said annular connection element and a central protuberance that rises from said annular housing, wherein said second group of elements comprises an annular portion having as a base an upper base of said second support, said annular portion comprises an upper end that comprises an annular flange, wherein said annular portion is a cylinder comprising a cavity at the centre thereof, wherein said annular portion is adapted to be housed within said annular housing, said central protuberance is adapted to be housed within said central cavity of said annular portion, wherein said locking teeth can be retracted into the annular connection element, wherein said locking teeth are adapted to pass from a retracted position within said annular connection element to an extracted position for engaging with said annular flange for creating a coupling of said first support with said second support, wherein said first group of elements comprises an upper through hole hollowed out within said central protuberance, wherein said second group of elements comprises a lower hole corresponding to said upper through hole, wherein said lower hole is hollowed out within said upper base of said second support, wherein said first fixing means is adapted to be fixed within the upper through hole and within the lower through hole so as to fix said first support to said second support.