INTERNAL COMBUSTION ENGINE CONTROL DEVICE

Provided is an internal combustion engine control device capable of more appropriately correcting an output value of a flow rate sensor that measures a flow rate of air flowing through an intake flow path of an internal combustion engine, and further reducing an error between a corrected air flow rate and an actual air flow rate as compared to a conventional device. For this purpose, the internal combustion engine control device of the present invention includes an arithmetic device including a fundamental frequency derivation unit that derives a fundamental frequency, a flow rate amplitude calculation unit that extracts a radio frequency of a plurality of frequencies equal to or higher than the fundamental frequency from a pulsation waveform based on the output value of the flow rate sensor as a flow rate radio frequency and calculates an amplitude of the flow rate radio frequency for each frequency, a correction amount derivation unit that derives a correction amount based on the amplitude of the flow rate radio frequency for each frequency, and a flow rate calculation unit that calculates a flow rate of air by using the output value of the flow rate sensor and the correction amount.