PROBLEM TO BE SOLVED: To provide a rear side material for a back pad, which can be maintained at low cost using cutting and sewing and further prevent frictional sounds generated around vertical holes regardless of the low cost.SOLUTION: In the rear side material for a back pad of a back rest that is a seat for a vehicle and has at least two vertical stay-insertion holes in a pad main body 2 are provided two cut pieces 4A and 4B, divided at a position to make the vertical holes 20 in the pad main body 2 by cutting a cloth seat material and then cut off into a vehicle front side piece and a vehicle rear side piece, which have protruding pieces 45 expanding from a principal portion 41 of the main body extended respectively at sites corresponding to the vertical holes 20. By sewing together portions 55 to be sewn together including both cut pieces 4A and 4B and also sewing together both side edges of two overlapped protruding pieces 45 and 45, nozzles 52a in the vertical holes 20 are formed by tip edges 46 of the protruding pieces and tubular portions 52 to be abutted on hole walls 201 forming the vertical holes 20 in the pad main body 2 are provided.
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