disclosed are a security safe and a self - service terminal provided with the security safe , wherein the security safe comprises a safe body with a safe door on at least one side thereof , the safe door is provided with a safe door locking engagement system , and the safe door locking engagement system comprises a movable latch for achieving the locking engagement between the safe door and the safe body . the locking engagement system also comprises a brittle part fixedly provided on the inner side of the safe door , the brittle part controls at least one safe pin , and when the brittle part is broken the safe pin keeps the movable latch locked . the security safe can solve the problem that there are weak areas in existing safes , and it has low cost and high reliability .