A fault reproduction assist system that assists a fault reproduction of an abnormal vehicle includes a configuration information acquisition unit that acquires, based on configuration information that is received from the abnormal vehicle and that includes hardware information of hardware in which an abnormality is detected and vehicle configuration information stored in advance in a storage unit, configuration information including the same hardware information as the hardware information of the abnormal vehicle; a configuration information determination unit that acquires from the storage unit software that includes the same software information as software information included in the configuration information acquired by the configuration information acquisition unit, and a distribution unit that distributes the software acquired by the configuration information determination unit to a fault reproduction environment for reproducing a fault.