A fixing device is for attaching a band to a watch case by a connecting link. The watch case includes a case middle, at least one pair of lugs, and a case back. The connecting link includes a passage accepting fixing structure of attachment to the watch case. The fixing structure is incorporated into the connecting link and includes an elastic return separating two pivots mounted with the ability to move inside the passage, and each capable of moving between a compressed position and a rest position in which the pivots are designed to rest in a hole formed in each lug of the watch case.