In an embroidery data preparing device, after an embroidery figure is blocked and a stitch order for the blocks is determined, it is judged whether the stitch terminal end portions of continuous embroidery blocks are adjacent to one another. If the stitch terminal end portions are not adjacent to one another, needle location points for mat-type stitches are calculated from a stitch start side. If the stitch terminal end portions are adjacent to one another, needle location points for mat-type stitches are calculated from a stitch terminal side for the block. Accordingly, mat-type stitch needle location lines which are obtained as virtual lines over plural blocks by needle points for mat-type stitches can be made continuous over the blocks even when the stitch advancing direction is different between the blocks.