The invention relates to an electrode cap for electroencephalography which allows contacting the head of a human or an animal without a conductive gel between the scalp and the electrode itself. Claim 1 relates to an electrode cap for contacting the scalp of a head in an electro- encephalography with a number of pin-shaped electrodes (12) for contacting the scalp, and an electrode holding means characterized in that the electrodes are mounted on the electrode holding means through at least one elastic ( 8, 11, 13, 17, 20) joint.