A payment card is provided including a support in the format of a conventional bank payment card, and having a first integrated circuit dedicated to banking operations, a second integrated circuit not dedicated to banking operations; at least one man/machine interface, the second integrated circuit being configured so as to activate at least one part of the man/machine interface in response to a directive from the user and according to an algorithm contained in the second integrated circuit. A memory space is connected to the second integrated circuit for saving data arising from the execution of the algorithm; the memory space being also connected to the first integrated circuit for reading of the data arising from the execution of the algorithm. A battery is provided for powering the second integrated circuit.