An operation controller controls operations of a plurality of electrical loads mounted on a vehicle and includes a start-up request accepting unit and a start-up coordinating unit. The start-up request accepting unit accepts a start-up request from the electrical loads. The start-up coordinating unit: controls start-up of the electrical load, from which the start-up request is output, on the basis of a priority assigned to the electrical load; outputs a signal for restricting start-up to a first electrical load having a relatively high priority, when the start-up request accepting unit accepts the start-up request from a second electrical load having a relatively low priority; and allows the second electrical load to start up, when the first electrical load is stopped after a predetermined waiting time elapses since the signal has been output.