To provide a garbage grinding and stirring apparatus capable of certainly grinding and stirring even an object to be treated such as garbage or the like, into and from which apparatus the object to be treated is easily charged and discharged.

A garbage grinding and stirring apparatus is equipped with a treatment tank 1 housing an object 9 to be treated, the cylindrical body 2 fixed to the central part of the treatment tank 1 and having a taper becoming thin upwardly and having a large number of grinding holes 22 formed thereto, the taper screw 32 vertically provided to the central part of the treatment tank 1 and having a taper becoming thin upwardly, a hopper 71 in which the object 9 to be treated is charged, the opening part 14 formed at the position shifted from the center of the bottom part of the treatment tank 1, a transport conveyor 7 for transporting the object 9 to be treated charged in the hopper 71 and the object to be treated fallen to the opening part 14 to the center of the bottom part of the treatment tank 1 and discharging the object to be treated fallen to the opening part 14 and spatulas 42 concentrating the object to be treated to the center of the bottom part of the treatment tank 1 and allowing the same to fall to the opening part 14.