The present invention relates to a tractor-pulling-type tuber harvester which is used to harvest a variety of underground crops such sweet potatoes and potatoes, which transfers a tuber, which is extracted from under the ground, on a conveyor, and which intermittently drives the conveyor to remove soil, which is put on the tuber, by inertia, comprising: a driving wheel which is inserted into the end unit of a power transfer shaft, which is extended towards the external side of a side plate, and which has a driving eccentric shaft on the external side a fixing cap which is inserted into a driving shaft of the conveyor, which is extended towards the external side of the side plate, and which has a head unit which is extended to the external side a unidirectional clutch which is inserted into the inside of the fixing cap a driven wheel which is fixated on an outer circumference of the unidirectional clutch and whose external side has a driven eccentric shaft and a linking rod whose both ends are combined with the driving eccentric shaft and the driven eccentric shaft with a hinge. The driven wheel makes a reciprocating motion at a certain angle by the rotation of the driving wheel. When the unidirectional clutch, which is linked with the driven wheel, makes a motion in a certain direction, rotation force is transferred to the fixing cap and the driving shaft of the conveyor, and when the unidirectional clutch makes a motion in the opposite direction, the unidirectional clutch idles, and the conveyor is driven intermittently and shakes off soil. Accordingly, since the conveyor performs a soil-removing function, it is not needed to have a separate soil-removing means, and since soil is removed in all sections of the conveyor, the soil, which is put on the tuber, can be more completely removed. Since the power of the conveyor is transferred by a single linking rod, the composition is simple, and it is safer than the conventional power transfer apparatuses such as a pulley
