To allow to surely hold sheets of music as they are open even under the state that desired pages are thickly pinched and, at the same time, to easily adjust the position of the sheet of music when the sheets of music having a large number of pages are employed by being placed on the music stand of a piano or the like.

By elastically pinching the mounting place of an object with an opening and closing body 2, which elastically opens and closes normal to the longitudinal direction thereof and integrally formed along the total longitudinal direction, a holder is so constituted as to be fixed to the edge part 4a of a keyboard cover 4 as one example of a mounting place. A holding part 3 for pinchingly holding sheets of music 6 as one example of paper sheets through elastic deformation is integrally formed along the total length of the opening and closing body 2.