The present report is aimed at studying the 24-h pattern of blood pressure in elderly subjects (45 men and 47 women, aged from 76 to 102 years), recruited in Campodimele, a small city where the population of ultra septuagenaries is very dense. The investigation has been performed by mean of ambulatory non-invasive monitoring combined with chronobiometric estimates. The computation has been performed on raw data, rhythmic series and integral profiles. The analysis has been stratified according to sex. The tabulated estimates constitute an index of reference for blood pressure 24-h pattern in aged people.