Sheet attaching instrument

The sheet attaching instrument includes an instrument body 12 and a fixing member 14 fixing the instrument body 12 to a sheet 1. The instrument body 12 has a first projection 20 and a second projection 30. The first projection 20 has a first shaft 21 and a first holding flange 22 extending from a tip end of the first shaft 21, while the second projection 30 has a second shaft 31 and a second holding flange 32 provided on a tip end of the second shaft 31. The fixing member 14 includes a first engaging portion 40 adapted to be engaged with the first projection 20 and a second engaging portion 50 adapted to be engaged with the second projection 30. After the first engaging portion 40 is slid relative to the first projection 20 for the engagement, the fixing member 14 is rotated with the first projection 20 as support point in a direction of approaching the instrument body 12. Then the second engaging portion 50 is engaged with the second projection 30.