To provide a rotary working machine that eliminates tilling unevenness and forms flat tilled soil.

In the rotary working machine 50 that includes a plurality of rotary tines (tilling tines) 45 for tilling soil, a tine shaft 45a furnished with the rotary tines 45 projecting on the outer circumference, and a rotary cover (tilling cover) 46 for suppressing scattering of tilled soil, connected to the rear of a tractor (self-propelled working machine) 21, and driven by drive force from the tractor 21, a soil collecting screw (rotary guiding body) 58 for guiding tilled soil to a track T of the tractor 21 is arranged on the front side of the tine shaft 45a and in the rotary cover 46, and the soil collecting screw 58 is driven by the drive force from the tractor 21.