Disclosed are a draft control device of a tractor and a tractor including the same. A draft control device of a tractor, according to the present invention, automatically lifts a three-point hitch so as to decrease a traction load when the plowing depth of a work machine, which is connected to the three-point hitch at the rear side of a tractor, becomes excessively deep while working such that an overload is applied, and comprises a top link fixing bracket (40) fixed at the rear side of the tractor, a top link swing bracket (42) hinge-coupled to the top link fixing bracket (40) through a connection pin (41), and carrying out rotational motion with respect to the axial center of the connection pin (41) according to the change of the compressive force of a top link (30) in response to the change of work machine traction resistance, a leaf spring (44) provided between the top link fixing bracket (40) and the top link swing bracket (42) so as to supply restoring force for the rotational motion of the top link swing bracket (42) with respect to the top link fixing bracket (40), and a sensitivity adjustment unit (46) provided between the top link swing bracket (42) and the leaf spring (44), and changing an acting point, at which the top link swing bracket (42) pushes the leaf spring (44), so as to adjust work machine traction load sensitivity.
