NOVELTY - A kneading machine used in organic-refuse composting apparatus comprises upper, and lower arms (12,13) are fixed to upper, and lower portions of a rotary shaft (17) of casing (11), where the main stirring blade (15) extends downwardly from the left end of the upper arm, to the rear side of the shaft, and is connected to the right end of the lower arm.    USE - Kneading machine for kneading organic refuse comprising foodstuff residue, shellfish shells, bones of small animals, hen droppings, pig urine, excreta of pet animals, sewage sludge, and putrefactive waste, in refuse composting apparatus installed in schools, restaurants, hospitals, and houses, and for use in ceramic industry, foodstuffs (health-promoting foodstuffs) processing plants, pharmaceutical industry, construction and civil engineering field, and resin finishing process.    ADVANTAGE - Enables efficiently stirring and kneading the material, by the cooperating action of the upper-arm side and lower-arm side portions of the blade. Enables cutting the organic waste material having difficult-to-cut fibers, by passing the waste through the gap between the cutting blades and the cutting pieces. Prevents overload state of the rotary shaft.    DETAILED DESCRIPTION - A kneading machine used in organic-refuse composting apparatus comprises upper, and lower arms (12,13) are fixed to upper, and lower portions of a rotary shaft (17) of casing (11), where the main stirring blade (15) extends downwardly from the left end of the upper arm, to the rear side of the shaft, and is connected to the right end of the lower arm. Upper-arm side of blade is twisted in same direction as shaft rotation-direction. Lower-arm side of blade is twisted such that kneaded material is turned upward in casing. A twisted sub stirring blade (16) extends downwardly from right end of upper arm, to front side of shaft, and is connected to left end of lower arm. Both the blades are bent in the central portion. Several cutting pieces are arranged in vertical stages, in the inner face of the casing. Several blades are arranged in vertical stages, at outer face of connection frame which connects the ends of the upper and lower arms. The blades protrude between adjacent cutting pieces. A heating unit maintains the casing at constant temperature.    DESCRIPTION OF DRAWING(S) - The figure shows a front view of the stirring unit of the casing.    casing (11)    upper and lower arms (12,13)    main and sub stirring blades (15,16)    rotary shaft (17)