An organic EL device which has a substrate containing a pixel portion, and a sealing cap covering the substrate, wherein an elastic member is arranged on a surface where the substrate and the sealing cap are contacted with each other. The organic EL device may further include an adhesive on the contacting surface. The organic EL device with the sealing structure effectively prevents external moisture or oxygen from being penetrated, and has the increased lifetime of the device and the decreased failure rate.
