Abstract: The advantage of the invention is to provide a handwriting input device in which a thickness of a line can be set while confirming a thickness of a line actually drawn in a more intuitive way. In the handwriting input device in which a line is drawn in the drawing region based on a stroke of a coordinate designated by pen inputting, a circular image of a size corresponding to the thickness of the line (the number of points) set in the setting region is displayed on the drawing area, and when the setting are completed, the circular image is faded out. With this configuration, a user can set the thickness of the line while seeing the thickness of the line to be drawn in the drawing region intuitively by observing the circular image displayed on the drawing region.