A device for monitoring wear on overhead contact lines by means of a force measurement system, said device having the following features: - two sliding contact bars (1a, 1b) oriented in operation at right angles to the overhead contact line to be monitored, - two connecting bars (2a, 2b) each having a first and a second end section and which in operation are oriented parallel to the overhead contact line and are pushed upwards so that the two sliding contact bars (1a, 1b) are pressed with a predetermined force against the overhead contact line, wherein - rod-shaped force transducers (4a - 4d) each having a first and a second end section and on which strain sensors are disposed are respectively arranged at each end section of the two connecting bars (2a, 2b), and - the first end sections of force transducers (4a, 4b) are connected to sliding contact bar, - the first end sections of force transducers (4c, 4d) are connected to sliding contact bar and - the second end section of force transducer is connected to the first end section of connecting bar, - the second end section of force transducer is connected to the first end section of connecting bar, - the second end section of force transducer is connected to the second end section of connecting bar and - the second end section of force transducer is connected to the second end section of connecting bar, characterised in that - the longitudinal axis of force transducers (4a, 4d) extends in the direction of the longitudinal axis of connecting bar and the longitudinal axis of force transducers (4b, 4c) extends in the direction of the longitudinal axis of connecting bar and - a plate-shaped spring element (5a1 - 5d1) is arranged between each of the sliding contact bars (1a, 1b) and the rod-shaped force transducers (4a - 4d). - two sliding contact bars (1a, 1b) oriented in operation at right angles to the overhead contact line to be monitored, - two connecting bars (2a, 2b) each having a first and a second end section and which in operation are oriented parallel to the overhead contact line and are pushed upwards so that the two sliding contact bars (1a, 1b) are pressed with a predetermined force against the overhead contact line, wherein - rod-shaped force transducers (4a - 4d) each having a first and a second end section and on which strain sensors are disposed are respectively arranged at each end section of the two connecting bars (2a, 2b), and - the first end sections of force transducers (4a, 4b) are connected to sliding contact bar, - the first end sections of force transducers (4c, 4d) are connected to sliding contact bar and - the second end section of force transducer is connected to the first end section of connecting bar, - the second end section of force transducer is connected to the first end section of connecting bar, - the second end section of force transducer is connected to the second end section of connecting bar and - the second end section of force transducer is connected to the second end section of connecting bar, - the first end sections of force transducers (4a, 4b) are connected to sliding contact bar, - the first end sections of force transducers (4c, 4d) are connected to sliding contact bar and - the second end section of force transducer is connected to the first end section of connecting bar, - the second end section of force transducer is connected to the first end section of connecting bar, - the second end section of force transducer is connected to the second end section of connecting bar and - the second end section of force transducer is connected to the second end section of connecting bar, - the longitudinal axis of force transducers (4a, 4d) extends in the direction of the longitudinal axis of connecting bar and the longitudinal axis of force transducers (4b, 4c) extends in the direction of the longitudinal axis of connecting bar and - a plate-shaped spring element (5a1 - 5d1) is arranged between each of the sliding contact bars (1a, 1b) and the rod-shaped force transducers (4a - 4d).