Cad cad data processing apparatus and data processing method

Provided are a CAD data processing device and a CAD data processing method suitable for producing a solid product by a three-dimensional printer. The CAD data processing device (100) comprises a control unit (110), an input unit (120), an output unit (130), a communication unit (140), a storage unit (150), and a display unit (160). The control unit (110) comprises an acquisition unit (111), an input reception unit (112), a processing unit (113), and a three-dimensional output control unit (114). The acquisition unit (111) acquires three-dimensional CAD data of a solid product, the input reception unit (112) receives an input operation designating at least one of division instruction surfaces which divide the solid product, and the processing unit (113) processes the three-dimensional CAD data so that the solid product is divided (cut) by the division instruction surface and a division area defined by a gap width.