The invention provides a construction machine provided with an engine for driving at least one hydraulic pump that supplies hydraulic oil to a hydraulic actuator, an exhaust adjustment mechanism for adjusting the rate at which exhaust flows from the engine, and a control device for controlling the exhaust adjustment mechanism, wherein the construction machine is characterized in that the control device determines whether a first slope-descending condition and/or a second slope-descending condition are/is satisfied, and when the first slope-descending condition and/or the second slope-descending condition are/is satisfied, the control device controls the exhaust adjustment mechanism so as to effect an exhaust brake.