To provide a filament winding device capable of making quality and productivity compatible.

This filament winding device 1 is constituted in such a way that fluctuation of winding speed is absorbed by operating an active dancer roll 28 in accordance with winding speed of a winding device 15. Consequently, fiber speed of a fiber 3 running in a tensile force providing device 4 is stabilized, and tensile force precision of the fiber 3 is ensured to improve product quality. Since a speed fluctuation absorbing device 25 is not installed on a supply head 18, size of the supply head 18 and its weight are not increased. Since it is unnecessary to set winding speed to low speed even in a product having large fluctuation of winding speed, productivity is greatly improved.