A reciprocating motor, comprising: a stator having an outer core, a coil wound on a bobbin configured to be inserted in a coil mounting groove of the outer core; and a mover having at least one magnet that reciprocates due to a magnetic field of the stator, wherein the outer core has an overall cylindrical shape and includes a plurality of radially stacked stator blocks configured by laminating together a plurality of stator sheets, wherein the outer core is configured such that the stator blocks contact each other at both side surfaces at their inner circumferential surface and are spaced apart from each other at both side surfaces at their outer circumferential surface, characterized in that the stator further comprises: an inner core having a cylindrical shape by including a plurality of stator sheets radially stacked sheet by sheet, wherein both circumferential side surfaces of the sheets contact each other at the inner circumference of the inner core and both circumferential side surfaces thereof at the outer circumference of the inner core are spaced apart from each other by a certain interval in a circumferential direction, and in that the outer and inner cores of the stator are connected to each other at one side end portion with respect to an axial direction of the stator forming a connection portion, while being spaced apart from each other at another side end portion thereof forming an air gap portion therebetween in which the at least one magnet reciprocates. a stator having an outer core, a coil wound on a bobbin configured to be inserted in a coil mounting groove of the outer core; and a mover having at least one magnet that reciprocates due to a magnetic field of the stator, wherein the outer core has an overall cylindrical shape and includes a plurality of radially stacked stator blocks configured by laminating together a plurality of stator sheets, wherein the outer core is configured such that the stator blocks contact each other at both side surfaces at their inner circumferential surface and are spaced apart from each other at both side surfaces at their outer circumferential surface, characterized in that the stator further comprises: an inner core having a cylindrical shape by including a plurality of stator sheets radially stacked sheet by sheet, wherein both circumferential side surfaces of the sheets contact each other at the inner circumference of the inner core and both circumferential side surfaces thereof at the outer circumference of the inner core are spaced apart from each other by a certain interval in a circumferential direction, and in that the outer and inner cores of the stator are connected to each other at one side end portion with respect to an axial direction of the stator forming a connection portion, while being spaced apart from each other at another side end portion thereof forming an air gap portion therebetween in which the at least one magnet reciprocates. an inner core having a cylindrical shape by including a plurality of stator sheets radially stacked sheet by sheet, wherein both circumferential side surfaces of the sheets contact each other at the inner circumference of the inner core and both circumferential side surfaces thereof at the outer circumference of the inner core are spaced apart from each other by a certain interval in a circumferential direction, and in that the outer and inner cores of the stator are connected to each other at one side end portion with respect to an axial direction of the stator forming a connection portion, while being spaced apart from each other at another side end portion thereof forming an air gap portion therebetween in which the at least one magnet reciprocates.