A working machine comprising: a hydraulic pump (18, 19); a first traveling device configured to be driven by a first traveling hydraulic actuator; a second traveling device configured to be driven by a second traveling hydraulic actuator; a first output tube configured to connect a first output port of the hydraulic pump (18, 19) to the first traveling hydraulic actuator; a second output tube configured to connect a second output port of the hydraulic pump (18, 19) to the second traveling hydraulic actuator; a first operation device configured to operate the first traveling device; a second operation device configured to operate the second traveling device; a correction mechanism (60A, 60B, 60C) configured to equalize a driving force of the first traveling hydraulic actuator and another driving force of the second traveling hydraulic actuator when the first operation device and the second operation device are operated each at same operation extents to perform a straight-traveling operation, characterized in that the working machine further comprises a traveling bypass valve configured to be switched between: a blocking position blocking, in the straight-traveling operation, supply of a pressured fluid between the first output tube and the second output tube; a first switching position (70a, 70b, 71a, 71b), in a right-turning operation, allowing the pressured fluid to flow from the second output tube to the first output tube and blocking the pressured fluid from flowing from the first output tube to the second output tube; and a second switching position (70a, 70b, 71a, 71b), in a left-turning operation, allowing the pressured fluid to flow from the first output tube to the second output tube and blocking the pressured fluid from flowing from the second output tube to the first output tube. a hydraulic pump (18, 19); a first traveling device configured to be driven by a first traveling hydraulic actuator; a second traveling device configured to be driven by a second traveling hydraulic actuator; a first output tube configured to connect a first output port of the hydraulic pump (18, 19) to the first traveling hydraulic actuator; a second output tube configured to connect a second output port of the hydraulic pump (18, 19) to the second traveling hydraulic actuator; a first operation device configured to operate the first traveling device; a second operation device configured to operate the second traveling device; a correction mechanism (60A, 60B, 60C) configured to equalize a driving force of the first traveling hydraulic actuator and another driving force of the second traveling hydraulic actuator when the first operation device and the second operation device are operated each at same operation extents to perform a straight-traveling operation, characterized in that the working machine further comprises a traveling bypass valve configured to be switched between: a blocking position blocking, in the straight-traveling operation, supply of a pressured fluid between the first output tube and the second output tube; a first switching position (70a, 70b, 71a, 71b), in a right-turning operation, allowing the pressured fluid to flow from the second output tube to the first output tube and blocking the pressured fluid from flowing from the first output tube to the second output tube; and a second switching position (70a, 70b, 71a, 71b), in a left-turning operation, allowing the pressured fluid to flow from the first output tube to the second output tube and blocking the pressured fluid from flowing from the second output tube to the first output tube. a blocking position blocking, in the straight-traveling operation, supply of a pressured fluid between the first output tube and the second output tube; a first switching position (70a, 70b, 71a, 71b), in a right-turning operation, allowing the pressured fluid to flow from the second output tube to the first output tube and blocking the pressured fluid from flowing from the first output tube to the second output tube; and a second switching position (70a, 70b, 71a, 71b), in a left-turning operation, allowing the pressured fluid to flow from the first output tube to the second output tube and blocking the pressured fluid from flowing from the second output tube to the first output tube.