INTERNAL COMBUSTION ENGINE CONTROL DEVICE AND INTERNAL COMBUSTION ENGINE CONTROL METHOD

A hybrid vehicle includes a battery, a generation unit having an internal combustion engine and a generator configured to supply electric power generated to a motor or the battery, the motor, and a mount which connects the internal combustion engine to a vehicle body. An internal combustion engine control device for the vehicle includes a generation unit activation determination portion which determines whether or not the generation unit needs to be activated to operate, a mount displacement quantity deriving portion which derives a mount displacement quantity indicating an extended/contracted length of the mount, and an internal combustion engine control portion which prohibits a start of the internal combustion engine in a case the mount displacement quantity exceeds a threshold.