To provide a winding device of a hose for spreading agricultural chemicals, capable of simplifying the agricultural chemicals spreading work, while reducing the stress in the work, preventing damage to a hose, and storing the hose ready for next use.

This hose winding device has a winding shaft 2 for the hose 1, and a driving shaft 4 for providing the torque in the hose taking-up direction to the winding shaft by the force of a power spring 3, and a speed increasing mechanism 5 is mounted between the winding shaft and the driving shaft.