To provide a fertilizer spreader which has fertilizer-spreading portions and an electric shutter aperture controller, can simply perform shutter opening or closing operations, can hold a once set shutter aperture, even when the shutter are repeatedly opened or closed, can prevent the variation in spreading quantity, and can spread the fertilizer on one side.

The shutter apertures of the fertilizer-spreading portions can electrically be adjusted, and can be set with aperture-setting dials, respectively, disposed in a control box. Circuits for operating the opening or closing of the shutters are independently set, and the shutters can be opened or closed without changing the set values of the shutter apertures. Even when a spreading work is interrupted at once set shutter apertures, the same quantity spreading operation can simply be continued. A one side spreading operation can be carried out by adjusting the shutter aperture of one side to zero.