The present invention intends to provide a rotary tilling apparatus capable of separating a power transmission system starting from a flywheel to a passive movement device through an elastic coupler from another power transmission system starting from the flywheel to a rotor of a motor generator, and thereby reducing a load applied to the rotor and preventing the power transmission system of the passive movement device from providing an negative effect to an engine and the rotor. A parallel hybrid power transmission mechanism (1) includes an engine (2), a crank shaft (2A) disposed on the engine (2), a motor generator (3), a passive movement device (4) configured to receive a motive power of the motor generator (3), an input shaft (4A) disposed on the passive movement device (4), a flywheel (5) coupled to the crank shaft (2A), an elastic coupler (6) configured to couple the flywheel (5) to the input shaft (4A), and a rotor (7) disposed on the motor generator (3) and coupled to the fly wheel (5).
