A construction machine comprising: a tank; a hydraulic pump; a first hydraulic actuator and a second hydraulic actuator (6, 7) each having two supply and discharge ports; a first meter-in valve (53a, 53b) provided on a hydraulic line connecting the first hydraulic actuator to the hydraulic pump; a second meter-in valve (63a, 63b) provided on a hydraulic line that establishes communication between the second hydraulic actuator (6, 7) and the hydraulic pump; a first meter-out valve (55a, 55b) provided on a hydraulic line that establishes communication between the first hydraulic actuator and the tank; a second meter-out valve (65a, 65b) provided on a hydraulic line that establishes communication between the second hydraulic actuator (6, 7) and the tank; a first pressure sensor that senses a first meter-in pressure that is a load pressure on the first hydraulic actuator; a second pressure sensor that senses a second meter-in pressure that is a load pressure on the second hydraulic actuator (6, 7); a third pressure sensor that senses a supply pressure that is a delivery pressure of the hydraulic pump; and a controller having a meter-in valve control section configured to calculate a target opening area of the first meter-in valve (53a, 53b) according to a pressure difference between the supply pressure and the first meter-in pressure, and calculate a target opening area of the second meter-in valve (63a, 63b) according to a pressure difference between the supply pressure and the second meter-in pressure, wherein the controller has a meter-out valve control section configured to calculate a target opening area of the second meter-out valve (65a, 65b) according to the pressure difference between the supply pressure and the second meter-in pressure, or calculate a target opening area of the first meter-out valve (55a, 55b) according to the pressure difference between the supply pressure and the first meter-in pressure, characterized in that the meter-out valve control section is configured to, in a case where the first meter-in pressure is higher than the second meter-in pressure, and a pressure difference between the first meter-in pressure and the second meter-in pressure is smaller than a first predetermined pressure difference, reduce the target opening area of the first meter-out valve (55a, 55b), or in a case where the second meter-in pressure is higher than the first meter-in pressure, and the pressure difference between the second meter-in pressure and the first meter-in pressure is smaller than a second predetermined pressure difference, reduce the target opening area of the second meter-out valve (65a, 65b). a tank; a hydraulic pump; a first hydraulic actuator and a second hydraulic actuator (6, 7) each having two supply and discharge ports; a first meter-in valve (53a, 53b) provided on a hydraulic line connecting the first hydraulic actuator to the hydraulic pump; a second meter-in valve (63a, 63b) provided on a hydraulic line that establishes communication between the second hydraulic actuator (6, 7) and the hydraulic pump; a first meter-out valve (55a, 55b) provided on a hydraulic line that establishes communication between the first hydraulic actuator and the tank; a second meter-out valve (65a, 65b) provided on a hydraulic line that establishes communication between the second hydraulic actuator (6, 7) and the tank; a first pressure sensor that senses a first meter-in pressure that is a load pressure on the first hydraulic actuator; a second pressure sensor that senses a second meter-in pressure that is a load pressure on the second hydraulic actuator (6, 7); a third pressure sensor that senses a supply pressure that is a delivery pressure of the hydraulic pump; and a controller having a meter-in valve control section configured to calculate a target opening area of the first meter-in valve (53a, 53b) according to a pressure difference between the supply pressure and the first meter-in pressure, and calculate a target opening area of the second meter-in valve (63a, 63b) according to a pressure difference between the supply pressure and the second meter-in pressure, wherein the controller has a meter-out valve control section configured to calculate a target opening area of the second meter-out valve (65a, 65b) according to the pressure difference between the supply pressure and the second meter-in pressure, or calculate a target opening area of the first meter-out valve (55a, 55b) according to the pressure difference between the supply pressure and the first meter-in pressure, characterized in that the meter-out valve control section is configured to, in a case where the first meter-in pressure is higher than the second meter-in pressure, and a pressure difference between the first meter-in pressure and the second meter-in pressure is smaller than a first predetermined pressure difference, reduce the target opening area of the first meter-out valve (55a, 55b), or in a case where the second meter-in pressure is higher than the first meter-in pressure, and the pressure difference between the second meter-in pressure and the first meter-in pressure is smaller than a second predetermined pressure difference, reduce the target opening area of the second meter-out valve (65a, 65b).