Provided is a vehicle seat with sheet-like sensors installed therein for detecting electrical signals corresponding to bioelectrical potentials of a seated person, such that noise from static electricity is eliminated, and bioelectrical signals of the seated person such as cardioelectric signals can be reliably measured. The seatback (2) of the vehicle seat (S) is provided with sheet-like sensors (20) which are capable of measuring the heart rate of a seated person. A seat frame (F2) has mounted thereon a cushion pad (P2) which in turn is covered with a trim cover (C2). A belt-shaped conductive fabric approximately 20mm wide and extending vertically is disposed on the outer face of the trim cover (C2). The portion where the conductive fabric (25) is disposed has a three-layer structure, of the conductive fabric (25), a surface skin (22), and wadding (23), in this order from the outer side inward. The free end of the conductive fabric (25) which is drawn inside the seatback (2) is provided with a J-hook (26). With the J-hook (26) engaged with a lower frame seating part (2d) (seat frame (F)), a portion of the conductive fabric (25) makes contact with the lower frame seating part (2d), and it is possible to transmit electricity.Linvention concerne un siège de véhicule ayant des capteurs du type feuille installés à lintérieur de celui-ci pour détecter des signaux électriques correspondant à des potentiels bioélectriques dune personne assise, de telle sorte quun bruit provenant de lélectricité statique est éliminé, et des signaux bioélectriques de la personne assise, tels que des signaux cardio-électriques, peuvent être mesurés de façon fiable. Le dossier (2) du siège de véhicule (S) est pourvu de capteurs du type feuille (20) qui peuvent mesurer la fréquence cardiaque dune personne assise. Un cadre de siège (F2) possède, monté sur celui-ci, un coussin (P2) qui est à son tour recouvert dun revêtement (C2). Un tissu conducteur en forme de ceinture, ayant une largeur dappr
