A machine for automatically positioning objects is disclosed. The machine has one inlet conveyor to transport objects in a lying position; a detector system to identify the orientation and/or shape of the objects; a robotic collection device to collect and position the objects according to information received by the detector system; a transfer conveyor having transfer fasteners arranged in fixed positions along a periphery of the transfer conveyor defining a closed loop around a tilted axis; an outlet conveyor to receive and transport the objects in an upright position; and a transfer fastener seat for the objects at each transfer fastener. The conveyor moves the fasteners seats because of the movement of the transfer conveyor between an upper receiving position, in which the object is held in a lying position, and a lower delivery position, in which the object is held in an upright position. The transfer conveyor and the outlet conveyor are synchronized.