Provided are a body surface bio-potential sensor (10) and an apparatus having the same. The sensor has a flexible membrane (11) having a wire layer, a plurality of electrodes (12) attached on one surface of the membrane at predetermined intervals, the electrodes having a plurality of needles of a predetermined height on a surface thereof and a cohesive layer (15) covering one surface of the membrane except predetermined regions of the electrodes. The sensor provides a removable attaching structure (14) with the transmitter (20), and has a low level noise because wires are not used. Due to a stable electrical boding structure, there are no complicated voltages or impedances caused by an unstable contact between the electrode and the human skin.
