The invention is intended to simplify the operation of a hearing aid device. Toward that end, means are present in the hearing aid device for storing the value of a parameter which can be set by the hearing aid device wearer by actuation of a control element, which parameter value was valid before the hearing aid device was turned off, with the result that the value of the parameter that was valid before the hearing aid device was turned off will be set automatically as the current value of the parameter after the device is turned off and then turned back on again.