An input device is provided, including a curved segment, a sensing segment and a second sensing structure. The sensing segment is pivotally connected to the curved segment and includes a first sensing structure. The second sensing structure covers the curved segment and the sensing segment. The curved segment includes a plurality of connecting bodies and a supporting element. Each connecting body includes a recess. Adjacent connecting bodies are mutually pivotally connected, and the recesses are connected to each other to form an accommodation space. The supporting element is disposed in the accommodation space and connected to the connecting bodies.