A packing case for packing a lock device is disclosed. The lock device includes a rose portion and a handle portion connected to the rose portion. The packing case includes a first casing, a second casing and at least one constraining structure. A first recessed portion is formed on the first casing for containing the rose portion. The second casing is combined with the first casing in a closable manner, and the handle portion is contained and constrained between the first casing and the second casing. The at least one protruding structure is disposed on the second casing for abutting against the rose portion when the second casing is combined with the first casing, so as to constrain the rose portion inside the first recessed portion.