SEAT COVER

To properly sew two cover pieces that are stitched together with a basic seam to another cover piece that is stitched with a basic seam across both sides of these.SOLUTION: A third cover piece 13 sewn with a basic seam S4 straddling both sides of first and second cover pieces 11 and 12 sewn with each other with a basic seam S1, and has a first bulky region A1 in which sewn portions L1 each with first and second cover pieces 11 and 12 sewn together, are folded thereon to be other sewn portions L3, and a non-bulky area A2 without these at a sewn portion with the first and second cover pieces 11 and 12. A back cover 10 further has a compensating member 20 that compensates for difference in thickness between the non-bulky region A2 and the first bulky region A1. The compensating member 20 has a laminated portion 21 laminated on the non-bulky region A2 and a relief portion 22 extending in a direction in which a sewing line extends in the first bulky region A1, avoiding overlapping with another sewing portion L3.SELECTED DRAWING: Figure 3 【課題】互いにインステッチで縫合される２枚のカバーピースを、これらの両サイドに跨ってインステッチで縫合される別のカバーピースに適切に縫合すること。【解決手段】互いにインステッチＳ１で縫合される第１及び第２のカバーピース１１，１２の両サイドに跨ってインステッチＳ４で縫合される第３のカバーピース１３は、第１及び第２のカバーピース１１，１２との縫合部に、第１及び第２のカバーピース１１，１２の縫合による縫い足Ｌ１が更なる別の縫い足Ｌ３として折り重なる第１の嵩張り領域Ａ１と、これらのない非嵩張り領域Ａ２とを有する。バックカバー１０は更に、非嵩張り領域Ａ２と第１の嵩張り領域Ａ１との厚さの違いを補う補填部材２０を有する。補填部材２０は、非嵩張り領域Ａ２に積層される積層部２１と、別の縫い足Ｌ３との重なりを避けて第１の嵩張り領域Ａ１を縫い線の走る方向に延びる逃がし部２２とを有する。【選択図】図３