A chain locker device for an offshore structure is disclosed. The chain locker device for an offshore structure according to an embodiment of the present invention comprises: a chain receiving part which provides a space to receive a chain therein; a guide part which extends from the center of the bottom end of the chain receiving part to the top; and an airbag which is installed in the guide part. Therefore, the present invention efficiently uses the chain receiving space of the chain receiving part.
