Abstract: There is a punching device comprising a body and a base separated from the body for accurately forming a desired pattern at a position required by a user. The body includes a jig on which a predetermined shape of pattern hole is formed, a punching member having a punching pin provided with a cutting blade corresponding to the predetermined shape of the pattern hole, and for punching a desired position of a sheet member while moving up and down with respect to the jig, and a resilient member interposed between the punching member and the jig for recovering the punching member, wherein at least two magnets are inserted into the jig. Through this construction, it is possible to simply and accurately align the pattern on the same line by attraction and repulsion of a plurality of magnets inserted into the jig and a guide plate, on which a pattern hole and a guide hole are formed in the same shape, respectively.