Abstract: A keyboard includes a plurality of keys, a palm rest portion and speakers. The speakers are encompassed by elastic members and are held by the elastic members in a region below the palm rest portion. The elastic members are cylindrical members mounted to the lower cover of the case, and the speakers are inserted into the elastic members in an upwardly facing position and emit sound upwards towards the output portions of the upper cover of the case. The upper cover deflects, when a user's hand is placed thereon, to be pressed onto the speaker to improve the output of the speaker.