Fuente: Wipo "precision agriculture" The present disclosure relates to a separator for an electrochemical device and an electrochemical device including the same, and particularly, to a separator for an electrochemical device, which can increase the trapping effect of transition metal ions that are generated from a positive electrode and can prevent a by-product that is deposited at a boundary surface of a positive electrode from obstructing a pore because a content of inorganic matter particles included in a porous polymer base is differently implemented depending on the locations of the inorganic matter particles, and an electrochemical device including the same.