An input device includes an operation surface, a first detection means, a second detection means, an operation signal generating means, and a transmission means. The operation signal generating means generates an operation signal used to perform a first operation on a screen where a detection result of the first detection means has been reflected, if the duration of the detection, which is performed at the same contact position by the first detection means, is shorter than a predetermined time. The operation signal generating means generates an operation signal used to perform a second operation on the screen where a detection result of the second detection means has been reflected, as long as the detection is continued at the same contact position, if the duration of the detection, which is performed at the same contact position by the first detection means, reaches the predetermined time.