Abstract: A status indicator for a door lock which is capable of being activated by a tail piece of the door lock has a first linking member which is operatively attached to the tail piece so as to be rotated by the tail piece and a second linking member which attaches between the first linking member and the indicating member. The second linking member translates the rotational movement of the first linking member to translational movement so as to move the indicating member linearly. The indicating member is housed within a housing plate which is attached to the door by the door lock. The indicating member moves within the housing member in response to change of the lock from a locked to an unlocked status and indicates this change so as to indicate the status of the lock, whether it is locked or unlocked.