An electronic device includes a housing including an opening, a key member disposed to project inwardly of the housing through the opening and, a switch disposed to face the key member, a first member disposed inside the housing, and a waterproof member disposed to surround the opening while being sandwiched between an inner surface of the housing and the first member. The first member includes a projecting portion that projects to be away from the opening and is contactable with the switch when the key member is pressed.