The apparatus (1) for measuring bioelectrical impedance of a patient (2) comprises a portable device (4) for measuring bioelectrical impedance provided with a controller, an electrical energy accumulator and a wireless data receiving and transmitting unit (7), a first pair of electrodes (10) and a second pair of electrodes (15), a first band (11) having a conformation suitable for fitting on a hand (12) of the patient (2) and incorporating the first pair of electrodes (10) and at least a first motion sensor (13), a second band (16) having a conformation suitable for fitting on a foot (17) of the patient (2) and incorporating the second pair of electrodes (15) and at least a second motion sensor (18), first connecting means (14) of the first pair of electrodes (10) with the portable device (4), and second connecting means (19) of the second pair of electrodes (15) with the portable device (4).
