PURPOSE: To handle objects to be loaded or unloaded always in the condition not visible directly from the outside and permit a single security member to perform safe and sure secured conveying works even in case handing-over is made on an ordinary road by docking, in locked state, an outer casing to be mounted on each dolly with a hatch formed at the strong-room of a security conveying car.

CONSTITUTION: A security member 6 having got out of a security conveying car 1 fetches a dolly 25 from a bank and returns to the place where the car is stopping, and there the facade of an outer casing 27 mounted on the dolly 25 is docked with a hatch 7 followed by locking which takes place automatically. He gets on the car 1, shuts the side door 10, and locks perfectly. Then he opens a partitioning door 15, comes into the strong-room 4, opens a hatch door 7a, opens the lock door 26 of the outer casing 27 downward, and draws out an object placing table 28 accommodated in the outer casing 27 under the guidance of guide rails 29, 30. Then he opens another partitioning door 20, takes out the intended object accommodated in an inner safe 18, loads on the placing table 28, moves it and stores in the outer casing 27, and shuts the lock door 26 followed by automatic locking. He 6 pushes the dolly 25, comes into the bank, and unlocks the lock door 26 of the outer casing 27 with a key deposited in the bank.