The invention relates to a contact system comprising a contact arm with two arms. The contact arm (3) is provided with contact pieces (10; 11) on the opposite ends thereof. Said contact pieces are brought into contact with or separated from corresponding contact pieces (12; 13) of fixed conductor rails (14, 15) and are rotatably mounted on a central bearing shaft (7) by means of an oblong hole (5). Both of its lever arms (8; 9) are subjected to the action of contact force springs (17; 18) which are supported by one end (20; 22) against a switching shaft or on a switching shaft segment (25). In order to ensure a uniform contact pressure in the instance of varying degrees of wear of the contact pieces (10 13), the oblong hole (5) extends in a direction (27) which differs substantially from the direction (28) perpendicular to the longitudinal axis (29) thereof as well as substantially from the longitudinal axis (29), and the longitudinal direction of action (26) of the contact force springs (17; 18) runs neither perpendicular to the longitudinal axis (29) nor perpendicular to the direction of extension (27) of the oblong hole (5).