Abstract: The portable self unloading storage container may be in the form of a trailer, which may be used to transport, store, and unload particulate material, such as sawdust, to be used as fuel for a furnace. A carriage is supported for reciprocating movement along the bottom of the storage container and a pusher extends transversely of the storage container and slides along the bottom to move a quantity of the material toward and out of the discharge end. A rotary digger is also supported by the carriage and operates to engage and loosen the material so that a portion of the particulate material is positioned on the rearward side of the pusher to be moved out of the delivery end with each rearward movement of the carriage to the discharge end.