An implantable electronic medical device has a device body and a header placed thereon, and includes a telemetry assembly for signal transmission to and/or from outside the body of a patient when the device is implanted, in particular for the wireless bidirectional communication. A transmit/receive antenna, which is physically formed of an elongated conductor and arranged in the region of the header and which is configured so as to have a form fit with the outer contour of at least a portion of the header, and is fixed thereby in the header, is at least largely assigned to the telemetry assembly. A first section of the conductor has a spring elastic design and forms a bracket or clamp. The bracket embraces a connector in the header. There is also described a transmit/receive antenna of a telemetry assembly of an implantable electronic medical device.