A foldable keyboard includes a main body, a first hinge portion and a locking element. The first hinge portion is mounted on a middle position of the main body. The locking element includes a locking portion mounted on the main body, a limiting portion mounted on the main body, and for receiving the locking portion, and a controlling portion mounted on the main body, and being received into the limiting portion. The main body is folded along the first hinge portion. The locking portion is engaged in the limiting portion to lock the foldable keyboard in a folding state. The controlling portion unlocks the foldable keyboard from the folding state.