The present invention relates to an electrode assembly for an electrochemical device. The electrode assembly has a structure in which a plurality of unit cells overlaps in a zigzag shape or is successively wound in a state where the plurality of unit cells adheres to one surface or both surfaces of a first separator having a relatively longer length than a width thereof. Here, the first separator includes a first porous electrode adhesion layer including inorganic particles and a polymer mixture on only the one surface on which the unit cells are adhered. Also, a second separator includes a second porous electrode adhesion layer including inorganic particles and a polymer mixture on both surfaces. The present invention also relates to an electrochemical device including the electrode assembly. The electrode assembly according to the present invention may separately use the separator including the porous electrode adhesion layer on both surfaces and the separator including the porous electrode adhesion layer on only the one surface to reduce an electrical resistance of the separators, thereby improving the performance of the electrochemical device.