To enhance excellent appearance by allowing manufacturing expenditure to be inexpensive and keeping fastening devices hidden an invisible in a seat cover concerning a fastening structure for the seat cover, which closes the opening of the seat cover covering a vehicle seat.

The fastening structure for the seat cover includes: a first fastening device 31 onto which one side end edge 22a of the opening 22 is sewed; and a second fastening device 41 onto which the other side end edge 22b of the opening 22 is sewed and to which the first fastening device 31 is fitted. The first fastening device 31 and the second fastening device 41 include double planar parts 36, 45 formed by folding a folding side planar parts 32b and a planar part 44. The one side end edge 22a and the other side end edge 22b are respectively sewed onto the double planar parts 36, 45.