A method for producing an integrally bladed rotor, in particular a gas turbine rotor, by means of joining, comprises the following steps:—Providing a blade (10) having a joining surface;—Providing a retaining mechanism having two clamping jaws (28);—Retaining the blade (10) at two opposite points of blade (10) by means of clamping jaws (28) in a purely force-closed manner; and—Pressing the blade (10) retained in a force-closed manner onto a basic rotor body, so that blade (10) is aligned independently in a joining position. A device for producing an integrally bladed rotor comprises a retaining mechanism for a blade (10) having two clamping jaws (28), and by pressing these jaws together, blade (10) is retained at two opposite points in a purely force-closed manner; and a mechanism for pressing blade (10) retained in a force-closed manner onto a basic rotor body, in such a way that blade (10) is aligned independently in a joining position.