Provided is an electronic device capable of enhancing salt damage resistance. An electronic device includes a circuit board 3 on which an electronic component 2 is mounted, a housing 4 that houses the circuit board 3, a connector 5 that is mounted on the circuit board 3 and is exposed to an outside of the housing via a first opening portion 4a of the housing 4, a cover member 6 that constitutes a part of a case 131 of an external device 103 to hold the housing 4, and has a second opening portion 66a to which the connector 5 is fitted, and a seal member 8 that is interposed between the connector 5 and the cover member 6, and liquid-tightly seals the case 131 of the external device 103. The housing 4 has a first wall portion 18 extending toward the cover member 6 so as to cover a part of the connector 5 at a distance, and the cover member 6 has a second barrier portion 68 extending toward the housing 4 so as to cover a part of the connector 5 at a distance.