1. An input apparatus for detecting a user's action that indicates an input command and for outputting an operation signal corresponding to the input command to an electronic device, comprising: attention detection means for continuously detecting a first action of the user that indicates an attention status of the user, and for deciding that the electronic device is under the attention status of the user while the first action of the user is continuously detected; action detection means for detecting a second action of the user that indicates the input command in accordance with the second action of the user, wherein the second action is different from the first action; and operation signal output means for outputting the operation signal corresponding to the input command to the electronic device, if the second action is detected while the first action is continuously detected.