Abstract: A character input keyboard (20; 20A) of a typewriter style for an electronic information processing apparatus having high frequency in ENTER operation is provided at the right and the left thumbs' home positions for finger operation in front and the center of an operator with a pair of front keys (21, 22) which can be depressed directly by the respective thumb rested thereon as the right and the left thumbs' home positions, one of the centrally juxtaposed right and left front keys (21, 22) being allocated to a front ENTER/RETURN key and the other to a SPACE key as a normal state of the keyboard, whereby direct enter/return operation by either of thumbs rested thereon as thumbs' home positions is physically possible.