Abstract: It is an object of the invention to provide an embroidery sewing machine and a drive device thereof, wherein a cover means is provided to close an opening of a box through which a means for holding an embroidering frame may be protruded out and may be moved for embroidery stitching operation, the holding means being connected to one of a first drive mechanism and a second drive mechanism of the drive device arranged within the box, the first drive mechanism being provided to move the holding means in a first direction and the second drive mechanism being provided to move the holding means in a second direction that is normal to the first direction.

Abstract: A sewing machine cover 2 includes a cover main body 7 and an extension cover portion 8. The cover main body 7 houses a left-right embroidery-frame drive mechanism 60 for driving an embroidery frame 50 in leftward and rightward directions. The extension cover portion 8 houses a front-rear embroidery-frame drive mechanism 80 for driving the embroidery frame 50 in front and rear directions. An opening 35 for engaging with an engagement portion 11 of a bed portion 3 is formed in a wall 31 of the cover main portion 7. When the sewing machine cover 2 is used as a cover of a sewing machine M, a bed surface 12 and an upper surface of the wall 31 form a substantially continuous work surface.