ABSTRACT
Measuring the length of the proportional units (PU) of different truncal parts in males and females and analyzing the relationship between these measurements showed that there was nosignificant gender difference in the length of one cun respectively for the perpendicular proportional units (PPU) of prothorax, epigastrium and flank but there were significant differences in the PPU of the hypogastrium, lateral thorax and hypochondrium and the horizontal proportional unit (HPU) of the back; within the same gender, there was no significant difference in the length ofone cun between the PPU of the prothorax and that of epigastrium and no significant difference betweenthe PPU of the flank and the HPU of the intermammillary region in males but there was a significant difference between PU of other parts.