Abstract: A window-blind includes at least two ladder ropes extended from a top rail to a bottom rail in vertical direction, and each ladder rope containing parallel first and second banded parts, and ladder strings in horizontal direction placed between the first banded part and the second banded part and distributed equidistantly, and each end of the ladder strings is connected with the first banded part and the second banded part respectively; multiple slats located between the first banded part and the second banded part, and placed successively on the ladder strings from top to bottom; the first banded part having the first side facing the slats and the second side back to the slats, and the first side of the first banded part forming the channel for the pulling cord to pass through; and the pulling cord and the part of the pulling cord pass through the channel.