another side opposite to one side facing the magnet frame 121 in this case in order to insertedly fix the magnet 122 to the magnet frame 121 a easily the slits 122 a are preferably opened toward the direction facing the magnet frame 121 in the reciprocating motor having such construction in accordance with the present invention the assembly of the movable unit 120 is completed by simply insertedly fixing the cylindrical magnet 122 to the magnet frame 121 at this time since the magnet frame 121 is provided with the groove 121 a the cylindrical magnet 122 is inserted upon the groove 121 a to be firmly fixed to the groove in addition since the slits 122 a are formed on the outer circumference of the magnet 122 when the magnet 122 is installed at the magnet frame 121 the slits 122 a are spread to a certain degree therefore the magnet 122 can be easily mounted at the magnet frame 121 in the reciprocating motor in accordance with the present invention when an external power is applied to the winding coil 115 magnetic flux is formed around the winding coil 115 the flux flows forms a kind of closed loop by flowing to the inner stator 112 along one path of the outer stator.