A fan type chemical diffusing apparatus includes an apparatus main body having an air inlet and an air outlet, a fan type blower disposed in the apparatus main body, and an active ingredient impregnated body or mass for containing an active ingredient. The fan type blower includes a fan casing, a motor, and a fan including a rotary disk and a plurality of blades fastened to a peripheral portion of the rotary disk and provided with a hollow space that is on an interior of the fan with respect to the blades. The fan type blower is operable to send air from the air inlet through the hollow space and out through the air outlet.