An electric power control device for controlling electric power consumption of a work vehicle that travels while carrying out a utility work, the electric power control device comprising: an operational state information acquisition section configured to acquire operational state information indicative of an operational state of the work vehicle and which includes at least a travel unit output and an implement unit output; a battery information acquisition section configured to acquire battery information indicative of a state of a battery which is mounted on the work vehicle and includes at least a charged state of the battery and a permissible discharge amount of the battery; a storage section configured to store in advance operational mode information specifying possible operational modes of the work vehicle and including at least a state of traveling without involving any work and a state of traveling involving work; the travel unit being configured to cause the work vehicle to travel, based on the operational state information, the battery information and the operational mode information; a distributed electric power calculation section configured to calculate based on the operational state information, the battery information and the operational mode information distributed electric powers of electric power outputted from the battery to be distributed respectively to the travel unit that causes the work vehicle to travel and the implement unit that effects the utility work; and an instruction section configured to instruct the distributed electric powers as output limitations to a travel unit control section that controls the travel unit and an implement unit control section that controls the implement unit, respectively. an operational state information acquisition section configured to acquire operational state information indicative of an operational state of the work vehicle and which includes at least a travel unit output and an implement unit output; a battery information acquisition section configured to acquire battery information indicative of a state of a battery which is mounted on the work vehicle and includes at least a charged state of the battery and a permissible discharge amount of the battery; a storage section configured to store in advance operational mode information specifying possible operational modes of the work vehicle and including at least a state of traveling without involving any work and a state of traveling involving work; the travel unit being configured to cause the work vehicle to travel, based on the operational state information, the battery information and the operational mode information; a distributed electric power calculation section configured to calculate based on the operational state information, the battery information and the operational mode information distributed electric powers of electric power outputted from the battery to be distributed respectively to the travel unit that causes the work vehicle to travel and the implement unit that effects the utility work; and an instruction section configured to instruct the distributed electric powers as output limitations to a travel unit control section that controls the travel unit and an implement unit control section that controls the implement unit, respectively.