An electronic device and keyboard thereof. The electronic device comprises a body and a keyboard. The body has a recess. The keyboard comprises a base and a securing mechanism. The securing mechanism comprises a track and a sliding member. The track is disposed on the base. The sliding member selectively moves relative to the track between a first position and a second position. When the sliding member is in the first position, an extending part of the sliding member engages with the recess. When the sliding member is in the second position, the extending part separates from the recess.