ROBOT CLEANER

PROBLEM TO BE SOLVED: To provide a robot cleaner allowing replacement of a cleaning unit performing wet cleaning on a floor face, and being able to sufficiently secure frictional force between a pad and the floor face.SOLUTION: A robot cleaner includes: a frame including wheels for traveling; a cleaning unit disposed in a lower part of the frame, cleaning a floor face, and disposed in front of the wheels; a tank disposed above the wheels, and supplying a fluid to the cleaning unit; a pump pumping the fluid stored in the tank such that the fluid stored in the tank is supplied to the cleaning unit; a hose extended to upper parts of the pump and the cleaning unit, through which the fluid pumped by the pump flows; and bumpers formed in side faces of the frame. The cleaning unit can be replaced.