An engine control device, which is capable of preventing fuel from being consumed more than necessary when a PTO device is in operation, is provided. An engine control device (5), in which a PTO device (12) is connected to a vehicle engine (1) and which controls a fuel injection quantity of the vehicle engine (1) when the PTO device (12) is in operation, is provided with PTO switching means for switching between operation and non-operation of the PTO device (12), and PTO fuel limiting means (3) for limiting a fuel injection quantity of the vehicle engine (1) to be less than a predetermined fuel limit value that is set in advance, when the PTO device (12) is switched to an operational state by the PTO switching means.