A robot hand includes a drive unit having a pair of moving elements provided so as to be movable in a lateral direction with respect to a center axis extending parallel with a longitudinal direction of an arm part to which the robot hand is attached, a pair of gripping claws each coupled to one of the pair of moving elements of the drive unit, and a joint for coupling the pair of gripping claws to each other so as to be pivotable. Each of the pair of gripping claws has a base end coupled to one of the moving elements so as to be pivotable and a front end for engaging with a workpiece. The pair of moving elements are operated to approach and move apart from each other in a lateral direction with respect to the center axis, thereby making the pair of gripping claws pivot about the joint and making the front ends of the gripping claws move apart from or approach each other.