The present invention provides a seaman style preset necktie characterized mainly in that the portions of the necktie below the tie knot are bifurated into two branches, there are no inner and outer ties as those with conventional neckties, and that the tie knot is suspended before the wearer's chest instead of being tied adjacent to the neck opening. In the present invention, both ends of the necktie are provided with zippers on the same side and the tie knot is provided with a pair of zipper sliders which are disposed invertedly relative to each other, the upper slider causing the portions of the necktie body to be gathered while the lower one causing them to be separated again, such that the position of the tie knot can be adjusted by sliding the sliders. After proper adjustment, by means of the fastening means on the ends of the outer cover of the tie knot, it is only necessary to fold and press said outer cover of the tie knot to be securely set.