To solve an overlap between a part table and components automatically and adequately in a drawing using a CAD. In a part table creating method for creating a part table including a plurality of rows of CAD data, an overlap between the part table and other geometric elements is detected. When the overlap is detected, the height of the respective rows of the part table is reduced to H1. When the overlap between the part table and the other geometric elements still remains even when the respective rows of the part table is reduced to the height H1, the number of overlapped rows between the part table and the geometric element are obtained. The portion of the overlapped rows is separated and moved in the direction to avoid the overlap with the geometric elements to separate into an original part table and a destination part table.