Abstract: The portable apparatus for acquiring and processing information relative to the dietetics and/or health of a person comprises, in combination, a series (2) of alpha-numeric keys for inputting information relative to the dietetics and/or the health of the user; at least one ROM in which are stored data and instructions in relation with this information; a display (5) for displaying the information introduced and the indications relating to them coming from the ROM; and a device for effectively inputting (3e) and refusing inputting (3d) of this information.