Device for receiving integrated circuit cards. The devices used until now in practice do not sufficiently protect the individual cards in all operating modes. The present device is intended to allow the cards to be locked. For this purpose, a locking mechanism (16) is provided, having at least one bar (9) which is designed as a lever (20, 21, 22) and can be moved out of a locking position into an unlocking position and vice versa and which is preferably held in its locking position with the aid of a holding device (23). The holding device (23) may, for example, be a torsion spring (36). In the case of another embodiment, the locking mechanism (16) may additionally have a closable blocking device (44) which acts on one of the abovementioned levers and can be moved out of a blocking position, preventing a movement of the relevant lever (21, 22), into a release position, releasing a movement of the lever (21, 22), and vice versa. The device is suitable in particular for protecting a plurality of cards to differing degrees and for using these for different purposes in cash registers.