This thesis describes a mathermatical model and graphical simulation for human being facial ageing phenomenon. The modelling procedure was defined as follows: study about the main characteristics of the facial ageing, the definition and measurement of the main affected áreas by the ageing; the generation of na ageing pattern based on the variation of the measured areas and the definition of ageing curves. The graphical simulation was based on the use of image processing techniques. A graphical software was developed using waríng procedures which promotes on facial images based on the mentioned ageing curves. Once the ageing phenomenon was mathematically modelled it is possible its scientific visualization. The main applications of the implemented software are in the Bioengineering área. The proposed model na help the understandig of the ageing which can be used in the development of new techniques to control its effects. The software also can be used as a decision support system in surgical área allowing the proposition of the ideal age for plastic surgery. Besides these scientific applications, social one is the assistance in the edentification of disappeared people.