PURPOSE: To provide a multiple screen CAP display device where the stereoscopic grasp of an observed object is easy on the multiple screen CAD display device where the stereoscopic grasp of the observed object by an operator is realized by combining display screens displaying planar pictures.

CONSTITUTION: A picture display means 11 where two display screens 11A and 11B are arranged forming a certain angle with one side interposed, a control means 13 preparing picture data which can fit to the two display screens 11A and 11B from a storage means 14 based on setting in an operation means 15 and a conversion means 12 converting picture data selected through the control means 13 and forming two kinds of picture information fitted to the two display screens 11A and 11B are provided.