A construction equipment, comprising: first, second, and third variable displacement hydraulic pumps (50; 51; 69) connected to an engine; a first traveling control valve installed in a first center bypass path of a first hydraulic pump to control the start, stop, and direction change of a left traveling motor; first control valves (58, 59, 68) installed in the first center bypass path on a downstream side of the first traveling control valve and connected together through a first parallel line to control hydraulic fluid being supplied to a boom cylinder, a swing motor, and an arm cylinder; a second traveling control valve installed in a second center bypass path of a second hydraulic pump to control the start, stop, and direction change of a right traveling motor; and second control valves (66, 67, 76) installed in the second center bypass path on a downstream side of the second traveling control valve and connected together through a second parallel line to control hydraulic fluid being supplied to the boom cylinder, a bucket cylinder, and the arm cylinder; and characterized by a first path connected to a discharge flow path of the third hydraulic pump and connected to the first and second center bypass paths (52, 60) of the first and second hydraulic pumps (50; 51) on the downstream sides of the first and second traveling control valves (54; 62) through first and second check valves (82; 83), respectively; and a second path connected to the discharge flow path of the third hydraulic pump and connected to the first and second parallel lines (55, 63) of the first and second hydraulic pumps (50; 51) on the downstream sides of the first and second traveling control valves (54; 62) through third and fourth check valves (85; 86), respectively. first, second, and third variable displacement hydraulic pumps (50; 51; 69) connected to an engine; a first traveling control valve installed in a first center bypass path of a first hydraulic pump to control the start, stop, and direction change of a left traveling motor; first control valves (58, 59, 68) installed in the first center bypass path on a downstream side of the first traveling control valve and connected together through a first parallel line to control hydraulic fluid being supplied to a boom cylinder, a swing motor, and an arm cylinder; a second traveling control valve installed in a second center bypass path of a second hydraulic pump to control the start, stop, and direction change of a right traveling motor; and second control valves (66, 67, 76) installed in the second center bypass path on a downstream side of the second traveling control valve and connected together through a second parallel line to control hydraulic fluid being supplied to the boom cylinder, a bucket cylinder, and the arm cylinder; and characterized by a first path connected to a discharge flow path of the third hydraulic pump and connected to the first and second center bypass paths (52, 60) of the first and second hydraulic pumps (50; 51) on the downstream sides of the first and second traveling control valves (54; 62) through first and second check valves (82; 83), respectively; and a second path connected to the discharge flow path of the third hydraulic pump and connected to the first and second parallel lines (55, 63) of the first and second hydraulic pumps (50; 51) on the downstream sides of the first and second traveling control valves (54; 62) through third and fourth check valves (85; 86), respectively.