Abstract: The invention relates to an arrangement and method for transporting test tubes (1) automatically between different processing stages and equipment in laboratories. In the method, the test tubes (1) are placed on transport bases (3) for transportation within the system and the identification data of the test tube (1) is read to identify the sample, after which the transport bases (3) can be moved within the transportation system with the aid of conveyors (15-18)to operation stations, for operations to be carried out on the test tube (1) or sample. The data.