An engine control device for controlling an engine of a vehicle includes a microcomputer for executing an engine control process, and an abnormality detection unit for detecting an abnormality of the microcomputer. A reset execution unit executes a process of causing an external monitor IC to reset the microcomputer on condition that the abnormality of the microcomputer is detected and an engine rotation speed is higher than a threshold engine speed value. The microcomputer may alternatively be reset on condition that a vehicle speed is higher than a threshold vehicle speed value, or that all or a part of torque output from the engine is able to be supplemented by another vehicle drive power source.