Exhaust gas purifying device for internal combustion engine

An exhaust gas purifying device for an internal combustion engine, comprising:

• an electrically heated catalyst which is provided on an exhaust passage of the internal combustion engine, which purifies the exhaust gas drawn to the exhaust passage, and which is warmed by electrification;
• an electrification characteristic setting unit which set an electrification characteristic indicating a characteristic of an electrification resistance value in the electrically heated catalyst, in accordance with an electrification condition at a time of starting the electrification of the electrically heated catalyst;
• and
• a unit which performs an abnormality determination and an electrification control for the electrically heated catalyst, based on the electrification characteristic set by the electrification characteristic setting unit.