A cigarette tobacco filler device includes a casing having an outlet for holding a cigarette tube in position, a plunger movably supported in said casing for delivering tobacco into the cigarette tube, and a plunger actuation unit which includes a power shaft rotatably supported in the casing to couple with the plunger and an operation handle which is pivotally extended above the top side of the casing and is arranged in such a manner that when the operation handle is pivotally moved down to the top side of the casing, the power shaft is driven to rotate so as to actuate the plunger for inserting the tobacco to the cigarette tube at the outlet.