An exhaust gas control apparatus includes an exhaust passage (19), a urea water tank (45), a urea adding valve (40), a urea pump (47), a pipe (46), and an electronic control unit (56). The electronic control unit (56) is configured to drive the urea pump (47) as a filling control when a condition requiring an execution of urea water addition by the urea adding valve (40) is satisfied such that the pipe (46) is filled with the urea water. The electronic control unit (56) is configured to execute the filling control when an exhaust pressure of the exhaust passage (19) is equal to or less than a specified value. The electronic control unit (56) is configured to stop the filling control when the exhaust pressure of the exhaust passage (19) exceeds the specified value during the execution of the filling control.
