A keyboard structure includes a housing having at least one post, a key assembly, and at least one connecting part. The key assembly includes a number of keypads and a keymat, the keymat defining a first through hole, a second through hole and a groove. The connecting part includes a ring, a protruding post and a connecting portion connecting the protruding post to the ring, the connecting part received in the first through hole, the second through hole and the groove, and then fixed on the keymat. The post passes through the key assembly and the ring coils around the post to connect the key assembly to the housing.