A storage device including a housing, a connector, and a storage element is provided. The housing has an opening. The connector and the storage element are disposed in the housing. The connector has a main body, a first terminal set, and a second terminal set, the first and the second terminal sets disposed at opposite ends of the main body are electrically connected to each other correspondingly. The second terminal set is connected to an external device. The storage element has a plurality of pads. The first terminal set connects to the pads correspondingly, such that the connector is electrically connected to the storage element. The first terminal set and the pads are exposed out of the housing through the opening. A producing method of the storage device is also provided.