The invention relates to a sealing device 1 for an electrical terminal 24 of a conductor carried in a carrier 21 which is electrically connected to a contact element 22 via the terminal 24. The sealing device comprises a housing having two housing parts 2, the two housing parts 2 being foldable at one end via a pivoting connection 4 to seal the terminal 24. The two housing parts 2 are respectively constructed as plate-shaped covers with large-area seals 3 on the inner faces of the covers.