PURPOSE: To simply form gathers to a curtain and to smooth the peeling, attachment and detachment of the curtain by arranging a large number of hooks to both surfaces of engaging pieces to form respective engaging surfaces and mutually differentiating the engaging strengths of the engaging surfaces to constitute a curtain attaching jig.

CONSTITUTION: A pair of female engaging pieces 12 forming female engaging surfaces 11 by a large number of loops are arranged to the opposed position forming gathers along upper end edge of a curtain 1. A curtain rail 2 is arranged above the curtain 1 and a large number of curtain runners 3 are arranged along the rail 2 in a freely movable manner. A curtain attaching jig 4 is constituted by an engaging piece 42 having first and second engaging surfaces 41a, 41b having a large number of hooks provided to both surfaces, thereof and the attaching part 43 extended from one end thereof to be provided to the curtain rail 2. Both engaging surfaces 41a, 41b are made different in engaging strength with respect to the same female engaging piece 12. By this constitution, the peeling, attachment and detachment of the curtain with respect to the curtain attaching jig 4 are smoothed.