PROBLEM TO BE SOLVED: To provide a surface cleaning robot performing treatment (cleaning) by applying a cleaning fluid on a floor and capable of performing motor drive and autonomous control or the like.SOLUTION: The surface cleaning robot includes: a robot body having a perpendicular transverse axis defined as a fore-aft ends and thereof; a right and left driving modules; and a scrub element disposed along a cleaning width. Each of right and left driving modules is equipped with a cup-shaped wheel having an outer diameter and an annular-shaped tire having an inner diameter fitted into the outer diameter of the cup-shaped wheel. When the robot moves on a cleaning surface toward the forward direction, the right and left driving modules are disposed at the rear of the scrub element and the total mass of the surface cleaning robot is less than 10 Kg.