A waterproof structure includes a housing and a waterproof button. The housing has a first surface, a first side surface, and a second surface. The first side surface is recessed in the first surface to define a first opening, the first side surface is connected between the first surface and the second surface, and the second surface is exposed from the first opening. The waterproof button is disposed in the first opening and includes at least one first water blocking structure, and the first water blocking structure is pressed and deformed to abut against the first side surface.