A sensor for measuring biosignals is provided. The sensor comprises at least one electrode comprising: a substrate comprising a flexible non-conductive material; a conductive layer configured to transfer electrical signals; a gel layer configured to transfer electrical signals; and a barrier layer configured to protect the conductive layer and transfer electrical signals, wherein the barrier layer deposited on the substrate, the gel layer is deposited on the barrier layer so that the gel layer covers only a part of the barrier layer, and the conductive layer is deposited over an area of the barrier layer which is outside of an area of the barrier layer on which the gel layer is deposited.