A micro-scalpel used to treat carpal tunnel syndrome has an elongated columnar blade, one end of the blade obliquely cut to form a tip, the obliquely-cut surface of the tip sufficiently sharp to pierce and cut skin of a patient. The other end of the blade is connected to a hollow sleeve connector, and the hollow sleeve connector is combined with a handle. The micro-scalpel is oriented perpendicular to a transverse carpal ligament, and swings from its proximal end toward its distal end to cut the transverse carpal ligament, thereby reducing the number of cuts of the blade and saving time for completing the carpal tunnel surgery.