PURPOSE: To improve working efficiency by providing an embroidery data processor with a rough display means for roughly displaying an image of each embroidery pattern stored in a single needle data memory.

CONSTITUTION: In embroidering, a drive processing function selecting mark is clicked among a group of function selecting marks on the image plane of a color display 31 to perform a design selecting process. and a design to be embroidered is selected. Then, a file setting process is performed, and the selected design is set as the machine driving data. In the design selecting process, preliminarily stored single needle data files are listed up and displayed on the image plane. Each design is constituted from matters concerning sewing point No., amount of relative movement of an embroidery frame, color selection, speed setting and the like. After the selection of a design, single needle data are read out to change the image plane into a realistic image display as to be able to image seams to some extent.