An electronic device and a manufacturing method thereof are disclosed. The electronic device includes a connector, an electronic component, and a heat sink. The connector has at least one conductive structure and at least one first heat dissipation structure. The at least one conductive structure and the at least one first heat dissipation structure are physically separated and electrically insulated from each other. The electronic component is electrically connected to the at least one conductive structure. The heat sink is connected to the at least one first heat dissipation structure. The heat sink and the electronic component are disposed on opposite sides of the connector.