Abstract: A lock assembly for an industrial computer to be locked and unlocked to a supporting frame set includes an insertion hole arranged on each of the two lateral sides of supporting frame set, a lock device arranged on a panel of the industrial computer, a push block formed to the lock device, and two insertion rods which are capable of pushing and being pushed by the push block. When the lock device is unlocked, the push ends of the insertion rods will elastic push the short axis end of the push block so as the insertion buckle ends will leave the insertion holes of the supporting frame set, and then the industrial computer is unlocked. While the lock device is locked, the push ends of the insertion rods will elastically push the long axis side of the push block so that the insertion buckle end will insert into the insertion hole of the supporting frame set.