invention will be described with reference to the drawings in the embodiment the invention is applied to an industrial or occupational multi head sewing machine including three multi needle embroidery sewing machines which can embroider three same embroidery patterns on respective caps at the same time the multi head sewing machine m will first be described referring to fig1 the multi head sewing machine m comprises an embroidering machine body frame 1 extending in the right and left direction and a generally rectangular machine support plate 2 mounted on the rear top of the frame 1 so as to extend in the right and left direction three multi needle embroidery sewing machines m 1 to m 3 are mounted on the support plate 2 so as to be juxtaposed in the right and left direction the embroidery sewing machines m 1 to m 3 have the same structure each of the embroidery sewing machines m 1 to m 3 includes an arm 3 having a distal end on which a sewing head 4 is mounted the head 4 has a front end on which a needle bar case 5 is mounted so as to be moved in the right and left direction six needle bars 10 are supported on the needle bar case 5 so as to be vertically moved a sewing needle 15 having a needle eye 15 a is fixed to each needle bar 10 a stud 6 is continuous to the arm 3 and has a lower end to which a sewing bed body 7 is continuous the sewing bed body 7 is fixed to the machine support plate 2 the.