Developing apparatus.

摘要

A developing apparatus which includes a plurality of developing units (3) individually provided with sensors (9,10) for detecting amounts of toner accommodated in them, characterized in that there are provided a judging device for judging whether or not sensor outputs of other developing units (3) are below a replenishable amount when a sensor output of one developing unit (3) falls below a replenishing requiring amount, and a replenishing display device (2,L) for urging toner replenishment, based on the result of the above judgement, with respect to the developing unit having the sensor output below the replenishing requiring amount and the developing unit whose sensor output is below the replenishable amount.