Parking Assisting Method and Parking Assistance Device

Whether an own vehicle is positioned in a parking space of a first type including a plurality of parking sections or the own vehicle is positioned in a vicinity of a parking space of a second type in which a single vehicle can be parked is determined. In a case where the own vehicle is determined to be positioned in the parking space of the first type, data representing a relative positional relationship between a target object indicating a parking section and a parking position in the target parking section are stored in a storage device, and in a case where the own vehicle is determined to be positioned in a vicinity of the parking space of the second type, data representing a relative positional relationship between a target object detected in the vicinity of the parking space and a target parking position are stored in the storage device.