Abstract: A serial printer easy to assemble and capable of being assembled through an automatic assembling process. A control device is disposed near and along one of the opposite sides of a chassis and electrical components and distributed functional devices are disposed opposite to the control device. The electrical components and the distributed functional devices are connected electrically to the control device by connectors having elastic contact portions which maintain elastic contact with the signal terminals of the control device, the electrical components and the distributed functional devices (210, 220, 230).