An electronic device according to various embodiments comprises: a case for accommodating at least one electronic part; an upper cover for covering at least one part of an upper end of the case; and a connector, which is arranged on the upper cover, for electrically connecting an external module and the at least one electronic part, wherein the upper cover can guide heat generated from the at least one electronic part such that the heat is discharged to the outside along a side part of the upper cover. Additional other embodiments are possible.