An input device including: a first operation detecting section which is provided on one stick and detects acceleration based on movement of the one stick; a second operation detecting section which is provided on an other stick and detects acceleration based on movement of the other stick; a first strike judging section which judges whether or not the one stick and the other stick have struck against one another, based on the acceleration detected by the first operation detecting section and the acceleration detected by the second operation detecting section; and an instructing section which instructs to produce a sound corresponding to striking of the one stick and the other stick against one another, when the first strike judging section judges that the one stick and the other stick have struck against one another.