Abstract: A tongs for inserting curtain carriers into a curtain rail comprises two arms having inward end faces turned toward one another. A cross bar of the curtain carrier rests upon rail shoulders to the left and right of a rail slot, and an upright bar of the carrier extends downwardly through the slot and bears a ring part therebelow. Each arm has a recess open at the top, and a bottom face extending transversely to, its inward face. The tong arms engage and hold fast in their recesses a curtain carrier from below. Each arm end comprises a centering plug protruding therefrom toward the opposite face so that, when the curtain carrier is seized between the arm ends of the closed tongs, the centering plugs penetrate with their free ends into the opening of the carrier ring part and hold the carrier fast on the bottom faces.