An apparatus having a thin film battery includes: a device electrically operating and including a substrate； and the thin film battery for supplying power to the device. The thin film battery includes: a first electrically conductive layer formed on the substrate； a second electrically conductive layer formed on the substrate while being spaced apart from the first electrically conductive layer and positioned on an identical plane to the first electrically conductive layer； a first electrode layer formed on the first electrically conductive layer and electrically connected to the first electrically conductive layer； a second electrode layer formed on the second electrically conductive layer, electrically connected to the second electrically conductive layer, disposed while being spaced apart from the first electrode layer in a side direction, and having a polarity opposite to a polarity of the first electrode layer； an ion conductive polymer electrolyte for covering both the first electrode layer and the second electrode layer； and a sealing film for sealing the ion conductive polymer electrolyte.
