(57) A mitre circular saw (1) with an upper table (36) comprises: a base (10) for placing a workpiece; a main body (30) having a saw blade (34) and vertically movable relative to the base (10); a safety cover (31A, 31B) rotatably movable for shielding or exposing the saw blade (34) by an upward and downward movements of the main body (30); a blade edge plate (14A, 14B) for defining a slit (15) where the saw blade (34) enters when the main body (30) is lowered; and an upper table (36) disposed above the main body (30) along which a workpiece is slidable. An inlet for chips (18) is formed in the upper surface of the base (10) forwardly of and partitioned from the slit (15), and chips generated by cutting the workpiece on the upper table (36) at the predetermined lowered position of the main body (30) arc guided to pass through an interior of the safety cover (31A, 31B) in the open position and to flow toward the inlet for chips (18).