An electrochemical device includes a casing, a storage element, an electrolyte, a wiring, and an adhesive layer. The casing forms a liquid chamber, the liquid chamber having a bottom surface provided with a recess. The storage element is housed in the liquid chamber. The electrolyte is housed in the liquid chamber. The wiring is connected to the recess. The adhesive layer is made of a conductive adhesive filled in the recess and configured to coat the wiring and cause the storage element to adhere to the casing.