A sheet processing apparatus according to the invention includes a sheet feeding tray capable of aligning and storing plural sheets, a discharging member that discharges a sheet at the top of a bundle of the sheets aligned from the sheet feeding tray, and a retracting member that moves the sheet at the top of the sheet bundle in a direction opposite to a direction of the discharge. The object of the present invention is to provide a handy medication delivery device that may be easily adjusted to the different needs of a given user in different situations and to the different needs of different users, and which is economic from a production point of view. The blue, green, and cyan color component values are coupled to inputs of a color monitor for display to produce a false color image of the tissue.