A key assembly which is configured to provide improved click feeling to a user and an electronic device having the same are provided. The key assembly includes a key body of elastic materials and contact projections, each of the contact projections which is protruded and formed from the key body and presses a switch device spaced apart from the key body by a gap providing a certain interval, wherein the key body is installed such that a contact surface of each of the contact projections is in contact with and pushed back by a certain distance by a pre-loading force of the switch device.