Excavator and forestry machine equipment comprising an upper swing structure, a levelling apparatus and a lower frame, whereby the leveling apparatus is mounted between the upper swing structure and the lower frame formed on a lower driving structure including a swing bearing formed on a lower part of the upper swing structure, left and right track chassis (4a, 4b), and a front arm and a rear arm connected to upper parts of the track chassis (4a, 4b), to keep a horizontal level of the upper swing structure against an inclined ground, the leveling apparatus comprising: a swing bearing mounting plate mounted on a lower part of the swing bearing and including a pair of pivot support parts projecting in a downward direction of the swing bearing to support a first tilt shaft and a pair of second piston holders; a support plate fixedly installed on an upper part of the lower frame and having a pair of pivot support parts projecting to support a second tilt shaft and a pair of first piston holders; a tilt plate mounted between the swing bearing mounting plate and the support plate to be tilted, and including a pair of first pivot holders formed to project upward from one end part of a main body, a pair of second pivot holders formed to project downward from the other end of the main body radially apart from the first pivot holders, a first shaft rotatably fixing the first pivot holders and the pivot support parts of the swing bearing mounting plate to form the first tilt shaft, and a second shaft rotatably fixing the second pivot holders and the pivot support parts of the support plate to form the second tilt shaft crossing the first tilt shaft in different directions; and a pair of first actuators (11a, 11b) one side of which is fixed to the tilt plate to rock the first tilt shaft during their extension and contraction, and a pair of second actuators (12a, 12b) fixed to rock one side of the swing bearing mounting plate during their extension and contraction, wherein the leveling apparatus further comprises a pair of first cylinder holders (35, 36) provided on the tilt plate to support the first actuators (11a, 11b) so that the first actuators (11a, 11b) can be extended and contracted downward, and a pair of second cylinder holders (37, 38) provided on the tilt plate to support the second actuators (12a, 12b) so that the second actuators (12a, 12b) can be extended and contracted upward; wherein the tilt plate includes a vertical center line crossing a center line in a length direction of the lower frame, and the respective actuators (11a, 11b, 12a, 12b) are installed to be radially apart from the vertical center line. a swing bearing mounting plate mounted on a lower part of the swing bearing and including a pair of pivot support parts projecting in a downward direction of the swing bearing to support a first tilt shaft and a pair of second piston holders; a support plate fixedly installed on an upper part of the lower frame and having a pair of pivot support parts projecting to support a second tilt shaft and a pair of first piston holders; a tilt plate mounted between the swing bearing mounting plate and the support plate to be tilted, and including a pair of first pivot holders formed to project upward from one end part of a main body, a pair of second pivot holders formed to project downward from the other end of the main body radially apart from the first pivot holders, a first shaft rotatably fixing the first pivot holders and the pivot support parts of the swing bearing mounting plate to form the first tilt shaft, and a second shaft rotatably fixing the second pivot holders and the pivot support parts of the support plate to form the second tilt shaft crossing the first tilt shaft in different directions; and a pair of first actuators (11a, 11b) one side of which is fixed to the tilt plate to rock the first tilt shaft during their extension and contraction, and a pair of second actuators (12a, 12b) fixed to rock one side of the swing bearing mounting plate during their extension and contraction, wherein the leveling apparatus further comprises a pair of first cylinder holders (35, 36) provided on the tilt plate to support the first actuators (11a, 11b) so that the first actuators (11a, 11b) can be extended and contracted downward, and a pair of second cylinder holders (37, 38) provided on the tilt plate to support the second actuators (12a, 12b) so that the second actuators (12a, 12b) can be extended and contracted upward; wherein the tilt plate includes a vertical center line crossing a center line in a length direction of the lower frame, and the respective actuators (11a, 11b, 12a, 12b) are installed to be radially apart from the vertical center line.