An exhaust gas control system for an internal combustion engine, the exhaust gas control system comprising: a filter arranged in an exhaust passage of the internal combustion engine, the filter being configured to collect particulate matter that is emitted from the internal combustion engine; a differential pressure sensor configured to detect an upstream-downstream differential pressure in the exhaust passage, the upstream-downstream differential pressure being a differential pressure between an exhaust pressure upstream of the filter and the exhaust pressure downstream of the filter; a temperature raising device configured to raise a temperature of the filter; and an electronic control unit configured to: i) estimate a particulate matter accumulation amount that is an amount of the particulate matter collected in the filter; ii) execute a pre-regeneration process for a predetermined period when the particulate matter accumulation amount becomes larger than or equal to a predetermined threshold, the pre-regeneration process including a process to raise the temperature of the filter by the temperature rising device to a second target temperature lower than a first target temperature, and the pre-regeneration process including a process to increase a concentration of nitrogen dioxide contained in exhaust gas flowing into the filter by the internal combustion engine; and iii) execute a filter regeneration process after completion of the pre-regeneration process, the filter regeneration process being a process to oxidize and remove the particulate matter collected in the filter by raising the temperature of the filter by the temperature raising device to the first target temperature, characterized in that the filter regeneration process being executed such that an execution time of the filter regeneration process when a speed of change in a detected value of the differential pressure sensor during execution of the pre-regeneration process is high is shorter than the execution time of the filter regeneration process when the speed of change is low. a filter arranged in an exhaust passage of the internal combustion engine, the filter being configured to collect particulate matter that is emitted from the internal combustion engine; a differential pressure sensor configured to detect an upstream-downstream differential pressure in the exhaust passage, the upstream-downstream differential pressure being a differential pressure between an exhaust pressure upstream of the filter and the exhaust pressure downstream of the filter; a temperature raising device configured to raise a temperature of the filter; and an electronic control unit configured to: i) estimate a particulate matter accumulation amount that is an amount of the particulate matter collected in the filter; ii) execute a pre-regeneration process for a predetermined period when the particulate matter accumulation amount becomes larger than or equal to a predetermined threshold, the pre-regeneration process including a process to raise the temperature of the filter by the temperature rising device to a second target temperature lower than a first target temperature, and the pre-regeneration process including a process to increase a concentration of nitrogen dioxide contained in exhaust gas flowing into the filter by the internal combustion engine; and iii) execute a filter regeneration process after completion of the pre-regeneration process, the filter regeneration process being a process to oxidize and remove the particulate matter collected in the filter by raising the temperature of the filter by the temperature raising device to the first target temperature, i) estimate a particulate matter accumulation amount that is an amount of the particulate matter collected in the filter; ii) execute a pre-regeneration process for a predetermined period when the particulate matter accumulation amount becomes larger than or equal to a predetermined threshold, the pre-regeneration process including a process to raise the temperature of the filter by the temperature rising device to a second target temperature lower than a first target temperature, and the pre-regeneration process including a process to increase a concentration of nitrogen dioxide contained in exhaust gas flowing into the filter by the internal combustion engine; and iii) execute a filter regeneration process after completion of the pre-regeneration process, the filter regeneration process being a process to oxidize and remove the particulate matter collected in the filter by raising the temperature of the filter by the temperature raising device to the first target temperature, characterized in that the filter regeneration process being executed such that an execution time of the filter regeneration process when a speed of change in a detected value of the differential pressure sensor during execution of the pre-regeneration process is high is shorter than the execution time of the filter regeneration process when the speed of change is low.