An electrode for a battery and a method for manufacturing the same are disclosed. The electrode for a battery according to the present invention comprising silicon nanostructures integrally formed on a silicon thin film and having a period array can reduce the internal resistance, have better charge transport properties, and reduce the structural stress, thereby exhibiting high storage capacity, high efficiency charge/discharge characteristics, and long charge/discharge cycle characteristics. Moreover, the method for manufacturing the electrode for a battery according to the present invention can simply and easily form a nanopattern with nanostructures on a silicon thin film using laser interference lithography (LIL) and dry etching.