A device for an electrode part (2) for a wireless biopotential measurement unit for attaching to the body, the measurement unit comprising a signal processor and transmitter part, and the electrode part (2) including at least one measuring electrode (22) for measuring a biopotential, the at least one measuring electrode (22) communicating with the signal processor and transmitter part, at least the electrode part (2) being provided with, on its side facing away from the body, a substantially covering screen material (18) which is electrically connected to an earth electrode, the earth electrode being in contact with the body. The measuring electrode (22) is surrounded by and isolated from an electrically conductive material (12), which is earthed to the signal processor and transmitter part.
