A latch mechanism for fixing a cover unit to a base unit of a foldable electronic device in a closed position is provided. The cover unit includes two locking portions. The base unit defines two slots. The latch mechanism includes a locking member, and at least one resilient member. The locking member is configured for being slidably received in the base unit. The locking member includes two protrusions. The locking portions of the cover unit extend through the corresponding slots of the base unit, and engage with the corresponding protrusions of the locking member for fixing the cover unit in the closed position. The resilient member is engagable with the locking member, for keeping the locking member in a locked position.