INTERNAL COMBUSTION ENGINE CONTROLLER

A controller is applied to such an internal combustion engine (1) that an exhaust throttle valve (23) for controlling the flow volume of exhaust gas of the exhaust passage (4) is provided in the exhaust passage (4), an intake variable valve mechanism (42) for changing the timing of opening and closing each intake valve (40) or an exhaust variable valve mechanism (43) for changing the timing of opening and closing each exhaust valve (41) is provided, and an overlap period when an opening period of the intake valve (40) and an opening period of the exhaust valve (41) overlap with each other can be provided, and controls the exhaust throttle valve (23) so that an opening degree of the exhaust throttle valve (23) in the overlap period is made smaller than an opening degree of the exhaust throttle valve (23) in a case where the overlap period is not provided.