A necktie wearing device includes a support plate (1) having a curved shape corresponding to the front surface of a necktie knot, a magnet (3) mounted in the center of the support plate, a rod-shaped lifting plate (2) connected to the support plate by using strings (5) connected to both ends of the support plate, and a case (4) provided on one side of the support plate (1), which case has a magnet (3) therein. The device further includes a knot unit (7) made of a fiber and having a necktie knot shape, a space (8) being formed in the knot unit for insertion of the support plate (1), and a necktie drawing hole (9) being formed at the lower end of the knot unit. This necktie-wearing device enables a user to wear various kinds of neckties in an easier and more convenient way and allows a wearer to adjust the length of the necktie as desired.