Provided is an obstacle-information-managing device for determining, with high precision, the presence of an obstacle around a vehicle. The obstacle-information-managing device is provided with an obstacle-information-acquiring means, an obstacle-detection-possibility-information-acquiring means, and an obstacle-presence-determining means. The obstacle-information-acquiring means acquires obstacle information pertaining to an obstacle around each of a plurality of vehicles including a host vehicle, said obstacle being detected using environment sensors mounted on the vehicles. The obstacle-detection-possibility-information-acquiring means acquires obstacle detection possibility information pertaining to the possibility, when at least one obstacle included in the obstacle information is detected using the environment sensor(s) mounted on at least one of the vehicles and at least one obstacle is not detected using the environment sensor(s) mounted on the remaining vehicle(s), as to whether at least one of the obstacles could in principle be detected using the environment sensor (s) mounted on the remaining vehicle(s). The obstacle-presence-determining means determines the presence of at least one obstacle on the basis of the obstacle-detection-possibility information and the obstacle information.