NOVELTY - A slidable stirrer (2) is equipped with up and down movable, pivoted plate (240) at an end opening. The movable plate is moved upwards in the opening while dipped in to-be-processed material of the treatment tank and moved downwards in the opening while the process material is ejected.    USE - For manufacturing manure from organic waste.    ADVANTAGE - The stirrer enables to carry and eject the organic waste to a fixed position in the treatment tank. Provides simple and compact structure and enables to carry out operation control easily. The manure is processed in large quantities within shorter period by the activation of Actinomyces with organic waste. Installation and maintenance cost is reduced.    DETAILED DESCRIPTION - The stirrer mounted between the tracks (11) provided along side wall of the treatment tank, carries out reciprocation movement along the track and to perform stirring of the material inside the tank. The stirrer has main rotor (22) having main rotatable stirring unit (222) which moves to bottom of the tank. A sub rotor (23) which is arranged at the back or front of the main rotor, has sub stirring unit (232) shorter than the main stirring unit. The stirring units are rotated in forward and reverse direction. The pivoted plate is arranged at front or back of the main and sub rotors. A drive source enables stoppage of the movement of the pivoted plate at preset rotation position. The peripheral surface of the board which accommodates the pivoting plate is a partial cylinder surface centering on rotation center. The drive source consists of a motor and a gear. The stirrer has ventilation unit which sends air to organic waste in the treatment tank. The treatment tank is equipped with sprinkling unit which sprinkles organic waste liquid, water or oil in the tank. An extractor takes out one portion of organic waste which has Actinomyces after acclimatization within the tank, from the tank. A mixer carries out mixed crushing of the extracted organic waste and the newly replenished organic waste. An injector supplies crushed mixture into the treatment tank. Several treatment tanks are provided and one set of the stirrer is moved between treatment tanks.    DESCRIPTION OF DRAWING(S) - The figure shows a side view of the slidable stirrer.    Stirrer (2)    Tracks (11)    Main rotor (22)    Sub rotor (23)    Main stirring unit (222)    Sub stirring unit (232)    Pivoted plate (240)