EXHAUST GAS PURIFYING SYSTEM

An exhaust gas purification system is provided with an exhaust gas purification device (19) for trapping particulate matter, and a control system that performs a regeneration control process to the exhaust gas purification device (19), wherein in cases where the regeneration control process is interrupted in accordance with stop of an internal combustion engine (10), during the stop of the internal combustion engine (10) (or at the time of starting thereof), the control system determines, based on a temperature (catalyst bed temperature) and an amount of PM deposition of the exhaust gas purification device (19), whether the exhaust gas purification device (19) is in a state where the regeneration control process can not be carried out efficiently, and does not resume the regeneration control process at the time of starting of the internal combustion engine (10), in cases where the exhaust gas purification device (19) is in the state where the regeneration control process can not be carried out efficiently.