To provide a yarn warping mechanism in a warping machine, capable of preventing occurrence of overlapping of the yarn in a specified length of the wound yarn.

This yarn warping mechanism in the warping machine has fixed guides 10 which guide the yarn 12 fed from a rotating yarn-carrying tool 11a to specified positions on carriers 3 while making contact with the fed yarn, the carriers 3 of which the each has such a mechanism as to control a winding pitch and a winding width of the yarn and transfer a group of the wound yarn to each of conveyor belts, and the conveyor belts 1 which convey the transferred groups of the yarn, wherein the fed yarn is wound on each of specified positions of the carriers 3 by being brought into contact with each of the fixed guides, and the winding pitch and the winding width of the yarn are each set by shifting the carriers parallel in the conveying direction of the conveyor belts, so that one of the groups of the yarn which is composed of a specified winding number and arranged in such a manner as to be easily rewound is formed on the each of the carries. Thus, the groups of the yarn are transferred to the conveyor belts from the carriers, while maintaining the formed arrangement of the yarn, after one, two or more groups of the yarn are each formed on the carriers.