ELECTRONIC DEVICE INCLUDING KEY BUTTON

An electronic device is provided. The electronic device includes a housing including an outer surface configured to at least partially form an external appearance of the electronic device, a button accommodation recess having a predetermined depth from the outer surface in a first direction oriented to the inner space of the electronic device, and at least one through-hole connected to the inner surface of the housing in the button accommodation recess, a key button disposed through the button accommodation recess, and including a key top inserted into the button accommodation recess and at least partially exposed to the outside, and a key base coupled to the key top, and including a protrusion facing a key flexible printed circuit board (FPCB) disposed in the inner space through the at least one through-hole. The protrusion may include an engagement portion formed at an end thereof to be larger than the protrusion.