To catch no garbage of a string-like shape in a screw by providing a throwing port and a discharge port at a front side of a storage chamber and to deviate no storage amount of the garbage by the screw of a constant rotation direction.

The throwing port and the discharge port are provided at a front side of the storage chamber. The screw type dust storage machine is constituted such that one throwing screw is provided at the throwing port and the garbage is rearwardly fed and one discharge screw is provided at the discharge port and the garbage is forwardly fed.