ROBOT CLEANER

A robot cleaner includes a main body and a wheel installed on the main body and configured to be driven by a driving motor to move the main body. The wheel includes an outer wheel including a tread configured to come into contact with a cleaning target floor and sidewalls provided on both side surfaces of the tread, and an inner wheel installed in the outer wheel and configured to receive a driving force from the driving motor. The outer wheel includes a plurality of tread grooves recessed in the tread. The outer wheel includes a plurality of deforming grooves formed in an axial direction of the outer wheel at positions corresponding to the plurality of tread grooves.