axial direction of the shaft portion 9183 the direction of that movement is determined by the direction of rotation of the adjusting screw 918 in this way the adjusting screw 918 may be coupled with the pair of the screw mounting portions 917 and adjust the gap between the pair of the screw mounting portions 917 such as to make the gap wider or narrower the adjusting of the gap between the pair of the screw mounting portions 917 adjusts the diameter of the inner frame 91 in accordance with the thickness of the work cloth 100 for example to the extent that the gap between the pair of the screw mounting portions 917 becomes narrower the diameter of the inner frame 91 becomes smaller therefore the embroidery frame 9 is able to clamp the work cloth 100 that has a greater thickness between the middle frame 92 and the inner frame 91 note that for ease of explanation the retaining ring 9185 is omitted from all of the drawings except fig6 a marker 110 is provided on an edge face on the top side of the inner frame 91 as shown in fig7 the marker 110 is provided by the drawing of a first circle 101 a second circle 102 a first center point 111 and a second center point 112 on the edge face on the to side of the inner frame 91 the second circle 102 and the first circle 101 are contiguous with one another in the circumferential direction of the inner frame 91 the diameter of.