Abstract: A driving assistance system includes: a storage apparatus (14) configured to store an operation result of a first assistance apparatus (50) performing first driving assistance on a first movable body (20A); a determination unit (135) configured to determine whether or not an operation result of a second assistance apparatus (40) performing second driving assistance on a second movable body (30) is related to the operation result of the first assistance apparatus (50) stored in the storage apparatus (14); an information providing unit (134, 133) configured to provide assistance information based on an operation result of the first assistance apparatus (50) when the determination unit (135) determines that the operation result of the second assistance apparatus (40) is related to the operation result of the first assistance apparatus (50); and an assistance unit (323) configured to perform driving assistance on the second movable body (30) based on the assistance information.