According to various embodiments, an electronic device may include a housing including an opening connected to an internal space, a tray socket disposed to be connected to the outside through the opening in the internal space and including a tray reception space, a tray inserted into the tray reception space, wherein the tray includes a tray body including at least one space configured to receive at least one external component, and a tray cover including a pin insertion hole configured to guide a tray ejecting pin to the opening, an eject bar movably disposed in a tray mounting direction or ejecting direction in the tray reception space and facing the pin insertion hole, and a rotation lever configured to press the tray in the ejection direction according to pressing of the eject bar in the tray reception space, wherein the eject bar is disposed at a position at least partially overlapped with the tray body when viewed from above the tray socket.