An abdominal impedance measurement apparatus includes a plurality of electrodes for measuring an abdominal impedance of a human subject, and includes an electrode supporting member for supporting the electrodes in such a manner that the electrodes protrude from the electrode supporting member. The electrode supporting member includes a plurality of segments aligned in a direction, the electrodes being respectively mounted on different segments, neighboring segments being connected rotatably with each other. The electrode supporting member further includes rotation-angle restricting parts for restricting relative rotation-angles between neighboring segments.