A sensor for measuring physiological electric signals, comprising: a textile electrode that comprises a detecting textile portion for detecting physiological electric signals and a peripheral textile portion directly adjacent to the detecting portion, in which the detecting portion has an electrically conductive detecting surface area that is intended to come into contact with the skin of an individual； a first electrical connection electrically connected to an acquisition and processing device of the physiological signals detected by the textile electrode, and an electrical connection that electrically connects the textile electrode to the electrical connector, in which the electrode has a three-dimensional textile structure made by interweaving warp threads and weft threads, in which the detecting portion comprises an upper textile layer the upper surface of which extends over the surface detection area and a lower textile layer, arranged below the upper layer and joined to the latter along a perimeter joining line so as to create a cavity defined by the joining line and to define a region outside the joining line that comprises the peripheral textile portion, and the cavity is filled by a filler material so that the detecting textile portion protrudes in height with respect to the peripheral textile portion.
