Device for loading medical containers in dosing machines, adapter for the containers, support for the adapters and use thereof.Device for loading medical containers on dosing machines, which comprises an adaptor for medical containers and a support for said adaptor, in which the support comprises attachment means to the dosing machine and in which said adaptor and said support comprise means for pivoting relative to one another and means for clipping to each other, said means being arranged in such a way that the pivoting of the adaptor and of the support by means of the pivoting means produces the clipping together of the adaptor and the support; and uses thereof and of the components thereof.