The present invention relates to a sock with integrated biometric monitoring. The invention includes a biometric sensor system integrated into a sock with the ability to process and store the biometric data collected in order to provide useful information to the user relating the user s biometric data to performance parameters of physical effort. The invention includes sensors integrated by means of suitable supports (2) in the textile structure of the sock including sensors for temperature (1) heart beat and pressure (5) applied by the user s foot for a processor (10 11) with signaling means (13) and interaction means (14) which interprets and sends (12) the data to a mobile device (15) that stores the data and allows the display of the data. The invention includes textile integration of biometric monitoring devices by means of conductive yarns (3 4 6 7) knitted with the sock and connected to sensors terminals (8 9) and encapsulations.