A cord aligning device formed with a plurality of guide holes allowing cords to be separately inserted therethrough is provided. Each of the guide holes includes a feed port into which a cord is fed, a delivery port from which the cord is delivered, an introducing portion provided continuously with the feed port, and a delivery portion provided between the introducing portion and the delivery port. The introducing portion is formed such that the area of a cross-section vertical to a centerline thereof is reduced gradually toward the delivery portion from the feed port, the area of a cross-section of the delivery portion vertical to a centerline thereof is uniform along the centerline over its total length, and the delivery portion is formed in a linear fashion. Moreover, the delivery portions of the plurality of guide holes are juxtaposed in a predetermined direction so as to form rows parallel to each other.