A clamping device of an adjustable steering column for motor vehicles, in which a rigidly connected with the vehicle chassis supports (4) with two a jacket tube (1) of the steering column comprehensive clamping jaws (2, 3) is connected, between which the a steering spindle (5) which accommodates the jacket tube (1) of the steering column can be fixedly clamped, with a the two clamping jaws (2, 3) which connects the clamping bolt (6), which at its one end portion (13) with an actuating lever (10), which is connected about the axis of the pins (19) is rotatable and with an at least at one of the clamping jaws (2, 3) arranged application device (7) which cooperates in such a way that, in the case of a rotation of the actuating lever (10) in the application direction, about the axis of the pins (19) the two clamping jaws (2, 3) the jacket tube (1) is clamped firmly and that in the case of a rotation of the actuating lever (10) opposite to the application direction, the clamping jaws (2, 3) the jacket tube (1) for the steering column, according to the invention, with respect to a simple and inexpensive manufacture and a space-saving construction improved in that the end portion (13) of the clamping bolt (6), a plate-shaped bolt head (13) is designed, that the actuating lever (10) at its with the clamping bolt (6) end region (11) is connected a stepped passage opening (14) with a for the passage of the clamping bolt (6) certain, of the steering column facing inner section (15) with a small diameter (d) and a for receiving the plate-shaped bolt head (13) specific, facing away from the steering column, outer section (16) with a large diameter (d) comprises.
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