Abstract: A locking device for transport containers or trolleys as used on aircrafts or generally in transportation, includes an anchoring mushroom on the freight floor. A locking lever with a nose engages the mushroom. The locking lever is journalled in a lock housing secured to the bottom of the container or trolley and held in locking position by two springs and by gravity due to a rotatable connection between the locking lever and an actuating lever which is also journalled at the bottom of the container or trolley. The levers can be released from their locked position by the actuation, for example, of a foot pedal.