Implantable electrode device

An implantable electrode device, particularly a cardiological electrode device, comprises an oblong, hose-like electrode body and a helical screw-in electrode, which is displaceable on the distal end of the electrode body between a retracted passive position inside the electrode body and an extended, active fixing position outside the electrode body, which is displaceable by a rotational movement of its electrode line, with the aid of a spindle-type cam controller, between the retracted passive position and the extended fixing position. The cam controller is formed by a separate cam coil, which is fixedly mounted in the electrode body and coaxially to the electrode supply line and, in addition, by a cam body, which is mounted on the electrode supply line rotationally fixed thereto and engages in the cam coil.