To prevent excess load application to a swirling frame.

A apparatus for composting treatment having a swirling frame capable of swirling around a supporting pole as a center installed in the center of a cylindrical storage tank, a swirling driving apparatus (a motor 25) for operating the swirling frame, a stirring apparatus capable of stirring compost raw materials stored in the storage tank by swirling unitedly with the swirling frame, and stirring operation apparatuses (motors 32, 42) attached to the swirling frame for operating the stirring apparatus, which further comprises an operational abnormality detection means (a ring plate 29, a proximity switch S, a first and a second timers 104, 105, and the likes) for detecting the operational abnormality of at least either one of the swirling frame and the stirring apparatus and a control means (an OR circuit 106, a switching circuit 107, a relay 103) for stopping the operation of both operation apparatuses when the operational abnormality is detected by the operational abnormality detection means.