INFORMATION PROCESSING APPARATUS AND OPERATION METHOD OF INFORMATION PROCESSING APPARATUS

An information processing apparatus includes: an apparatus body including a body having a keyboard and a display unit attached to the body so as to be opened and closed; an acceleration sensor mounted on the apparatus body; a gesture motion determination unit mounted on the apparatus body and determining a reference posture of a holding state of the apparatus body taken when a user executes a given gesture function while holding the apparatus body based on acceleration detected by the acceleration sensor as well as determining a gesture motion executed by the user by detecting posture change of the apparatus body from the reference posture based on acceleration detected by the acceleration sensor; and an operation execution unit mounted on the apparatus body and executing a given operation corresponding to the gesture motion executed by the user based on the determination result in the gesture motion determination unit.