Sensor for measurement of physiological electrical signals

A sensor for measuring physiological electric signals, including: a textile electrode including a detecting portion having an electrically conductive detecting surface area; a peripheral textile portion; a first electrical connection electrically connected to an acquisition and processing device, and an electrical connection that electrically connects the textile electrode to the electrical connector, the electrode having a three-dimensional textile structure made by interweaving warp threads and weft threads, the detecting portion including an upper textile layer 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 includes the peripheral textile portion, the cavity being filled by a filler material so that the detecting textile portion protrudes in height with respect to the peripheral textile portion.