A water level/vibration sensor for a washing machine is provided. The water level/vibration sensor includes a sensor housing mounted to a cabinet of a washing machine, a diaphragm configured to deform in shape depending on a change in a water level in a water storage tank, and a pusher configured to be moved up and down inside the sensor housing in response to the deformation in shape of the diaphragm. The water level/vibration sensor further includes a core mounted to the pusher, a coil mounted to the sensor housing and configured to surround the core so as to provide a specific inductance value corresponding to movement of the core, and a vibration chamber mounted to the pusher and configured to accommodate a vibrator vibrating in conjunction with a vibration of the water storage tank.