ELECTROCHEMICAL DEVICE

The present disclosure relates to an electrochemical device including a membrane electrode assembly, a first separator including a manifold part through which a reaction fluid is introduced or discharged, a flow path part spaced apart from the manifold part, and a through-hole provided between the manifold part and the flow path part and configured to guide the reaction fluid, which has passed through the manifold part, to the flow path part, a first porous transport layer configured to entirely cover the flow path part and the through-hole and interposed between the membrane electrode assembly and the first separator, and a first protrusion pattern provided on the first separator, and configured to support the first porous transport layer on the first separator while defining a guide flow path configured to guide the reaction fluid, which has passed through the through-hole, to the flow path part.