The present invention relates to a fuel supply device with a low pressure region possessing a pump device, so that the fuel can be transmitted to a high pressure region from the low pressure region. A pressure storage system which is permanently located in the high pressure is arranged in the high pressure region between the pump device and an ejector, comprises distribution units which are connected via high pressure pipelines, is connected with the pump device via a high pressure pipeline which is similarly permanently in the high pressure, and is connected with the ejector via the high pressure pipeline which is located in the high pressure temporarily and depends on the ejection beat. All distribution units of the pressure storage system are connected with a common leakage total pipeline with a common leakage sensor used for all distribution units to detect the leakage amount above a limit value of the pressure storage system, and independent visual inspection devices are correlated with the distribution units, so that the detected leakage is correlated with at least one distribution unit.