A power generation control device, comprising: a power generator driven by an internal combustion engine; a storage battery for storing electric power generated by the power generator; and a controller for controlling the internal combustion engine and the power generator, wherein the controller is arranged such that: the controller is configured to determine whether or not to permit the power generator to generate power, depending on a state of the storage battery; the controller is configured to set a power generation amount that corresponds to an output that is necessary, for cruising, corresponding to a driving state, and to set an add-on power generation amount that corresponds to an electric power amount that is necessary corresponding to a vehicle state and the driving state, if power generation is permitted by the controller; wherein the power generation control device is characterized in that if total of the power generation amount and the add-on power generation amount is lower than a minimum power generation amount, the controller is configured to control the internal combustion engine and the power generator, based on the minimum power generation amount; if the total of the power generation amount and the add-on power generation amount is higher than or equal to the minimum power generation amount, the controller is configured to control the internal combustion engine and the power generator, based on the total of the power generation amount and the add-on power generation amount; and in that the controller is configured to derive the minimum power generation amount, based on a remaining capacity being a state of charge of the storage battery. a power generator driven by an internal combustion engine; a storage battery for storing electric power generated by the power generator; and a controller for controlling the internal combustion engine and the power generator, wherein the controller is arranged such that: the controller is configured to determine whether or not to permit the power generator to generate power, depending on a state of the storage battery; the controller is configured to set a power generation amount that corresponds to an output that is necessary, for cruising, corresponding to a driving state, and to set an add-on power generation amount that corresponds to an electric power amount that is necessary corresponding to a vehicle state and the driving state, if power generation is permitted by the controller; wherein the power generation control device is characterized in that if total of the power generation amount and the add-on power generation amount is lower than a minimum power generation amount, the controller is configured to control the internal combustion engine and the power generator, based on the minimum power generation amount; if the total of the power generation amount and the add-on power generation amount is higher than or equal to the minimum power generation amount, the controller is configured to control the internal combustion engine and the power generator, based on the total of the power generation amount and the add-on power generation amount; and in that the controller is configured to derive the minimum power generation amount, based on a remaining capacity being a state of charge of the storage battery. the controller is configured to determine whether or not to permit the power generator to generate power, depending on a state of the storage battery; the controller is configured to set a power generation amount that corresponds to an output that is necessary, for cruising, corresponding to a driving state, and to set an add-on power generation amount that corresponds to an electric power amount that is necessary corresponding to a vehicle state and the driving state, if power generation is permitted by the controller; wherein the power generation control device is characterized in that if total of the power generation amount and the add-on power generation amount is lower than a minimum power generation amount, the controller is configured to control the internal combustion engine and the power generator, based on the minimum power generation amount; if the total of the power generation amount and the add-on power generation amount is higher than or equal to the minimum power generation amount, the controller is configured to control the internal combustion engine and the power generator, based on the total of the power generation amount and the add-on power generation amount; and in that the controller is configured to derive the minimum power generation amount, based on a remaining capacity being a state of charge of the storage battery.