An objective of the invention is to eliminate the need of a frequent dust waste by the user and to provide efficient device for wasting the dust that has been collected in the robot cleaner. The invention provides a robot cleaner capable of discharging dust out to a dust discharge station, wherein the robot cleaner is capable of moving autonomously to collect dust, the robot cleaner comprising: a dust container for storing dust; a dust inlet for collecting dust into the dust container; and an opening and closing mechanism of the dust container, provided at a bottom surface of the robot cleaner, for discharging dust collected in the dust container.