Abstract: The invention relates to a treatment bed for supporting patients in a sitting and/or lying manner for the duration of a treatment and/or diagnosis. The treatment bed has a support surface which consists of one or more segments and on which the patient is supported during the treatment and/or diagnosis. Multiple capacitive measuring electrodes for the contactless capacitive detection of EKG signals of a patient supported on the support surface are arranged in at least one segment of the support surface on the surface side closer to the patient. The treatment bed further has at least one electronic signal processing system which is connected to the measuring electrodes and is designed to process signals, in particular to amplify signals, of the electric signals of the measuring electrodes.