An opening switch (1) for vehicle doors or rear hatches comprises an actuator device (5) for activating a microswitch (6) which can be moved between two positions: a first open position in which the actuator device is kept away from the microswitch (6), and a second closing position in which the actuator device is in contact with the microswitch (6). The actuator device for activating the microswitch (6) comprises a rocking actuator (5) which incorporates within itself at least one pair of elastic tongues (7) whose reaction brings about return of the rocking actuator (5).