An input apparatus including: a first operation detecting section provided on a first operating section which detects acceleration and angular speed based on movement of the first operating section; a second operation detecting section provided on a second operating section which detects acceleration and angular speed based on movement of the second operating section; a judging section which judges whether or not the first and second operating sections have been held together, based on the accelerations and the angular speeds detected by the first and second operation detecting sections; a detecting section which detects a change operation based on the accelerations and the angular speeds detected by the first and second operation detecting sections, when the judging section judges that the first and second operating sections have been held together; and a changing section which changes a predetermined parameter in accordance with the change operation detected by the detecting section.