A power tool including: a base slidable on a workpiece, and an opening provided through the base; a main unit supported to the base and movable in a first direction substantially perpendicular to the base, the main unit including an electric motor; a cutter driven by the electric motor, the cutter being capable of protruding through the opening from the base; a stopper pole supported to a housing coupled to the main unit, the stopper pole being movable in the first direction, the stopper pole having one end protruding from the housing toward the base, thereby regulating a moving distance of the cutter; a digital display unit including a moving distance detection portion for detecting a moving distance of the stopper pole and a digital display portion for displaying the moving distance; and a dust prevention member provided between a part of the stopper pole protruding toward the base and the moving distance detection portion, thereby preventing dust from entering into the housing.