A carousel labeling machine and a supporting carriage of a labeling station, the carousel labeling machine comprising a plurality of peripheral seats which are each adapted to accommodate said supporting carriage of a labeling station which is provided with two front and two rear wheels (3a, 3b, 4) for resting on the floor and for allowing an approach of the carriage to said seats, each seat being supported integrally by the structure of the carousel and comprising means adapted to lock a carriage in such a position as to ensure the correct application of the labels to the containers that are present on the carousel by the labeling station mounted on said carriage, wherein the seats are provided with locking means which are adapted to provide the condition by way of which the carriages are locked in each seat in an identical position with respect to the carousel, so as to ensure the possibility of interchange of carriages among the various seats, characterized in that: - said carriage comprises a front pair and a rear pair of cylindrical tabs (10a, 10b, 11a, 11b) which are mutually aligned transversely, the tabs of the rear pair being aligned longitudinally with the tabs of the front pair, and further comprises two coaxial wheels which are fixed externally to the structure of the carriage along an axis which is transverse to said carriage; - each seat comprises a substantially horizontal plate which is shaped appropriately so as to penetrate between the two cylindrical tabs (10a, 10b, 11a, 11b) which form respectively the front pair and the rear pair, so as to ensure that the carriage has the correct radial position with respect to the carousel when it is pushed by an operator, a slider being present on said plate, having means for movement at right angles to said plate and supporting two hooks (19a, 19b), which are adapted to make contact with the two wheels which are fixed to the carriage, so as to cause the lifting thereof from the position in which all the wheels (3a, 3b, 4) are in contact with the floor to a preset height with the front wheels (3a, 3b) raised from said floor. - said carriage comprises a front pair and a rear pair of cylindrical tabs (10a, 10b, 11a, 11b) which are mutually aligned transversely, the tabs of the rear pair being aligned longitudinally with the tabs of the front pair, and further comprises two coaxial wheels which are fixed externally to the structure of the carriage along an axis which is transverse to said carriage; - each seat comprises a substantially horizontal plate which is shaped appropriately so as to penetrate between the two cylindrical tabs (10a, 10b, 11a, 11b) which form respectively the front pair and the rear pair, so as to ensure that the carriage has the correct radial position with respect to the carousel when it is pushed by an operator, a slider being present on said plate, having means for movement at right angles to said plate and supporting two hooks (19a, 19b), which are adapted to make contact with the two wheels which are fixed to the carriage, so as to cause the lifting thereof from the position in which all the wheels (3a, 3b, 4) are in contact with the floor to a preset height with the front wheels (3a, 3b) raised from said floor.