A hair clipper includes a comb-like fixed blade and movable blade having a plurality of blade pieces arranged in parallel. The fixed blade and the movable blade is overlapped with each other and the movable blade is reciprocatively slid with respect to the fixed blade in an arrangement direction of the blade pieces. Each blade piece of the movable blade has blade edges formed at both sides thereof, each blade edge being formed with a leading rectilinear part and a basal rectilinear part; the leading rectilinear part and the basal rectilinear part are inclined with respect to the blade edges formed at both sides of each blade piece of the fixed blade by an acute included angle α; and each blade edge of the movable blade has a rake surface facing an opposite side to the fixed blade.