A miter saw includes a base unit, a cutting unit having a rotary cutting blade, a motor for driving the rotary cutting blade, and a housing having a blade cover for covering a part of the cutting blade and a motor housing connected to the blade cover, a supporting unit supported to the base unit for pivotably supporting the cutting unit, the supporting unit being configured to move the cutting unit toward and away from the base unit in a first direction, the supporting unit including a guide unit supported with respect to the base unit, and a sliding unit having a pivot shaft pivotably supporting the cutting unit, the sliding unit being slidable on the guide unit to move between a front position and a rear position in the second direction and the pivot shaft extending in a third direction which is perpendicular to the first and second directions.