Background:We determined lipid parameters which are the leading causes of developing cardiovascular diseases and atherosclerosis and investigated the increased serum triglyceride level which is referred to as atherogen triad , decreased high-density lipoprotein and increased low- density lipoprotein associating with age and sex.Method:237 people who were done lipid level parameter tests in the Central Hospital Laboratory were involved in the study. We identifed cholesterol, triglyceride, lowdensity lipoprotein (LDL) and high-density lipoprotein ( HDL) (COBASC-311,ROCHE,Germany) which are the lipid parameters using full automatic apparatus .Results:While serum cholesterol level increased in the ages between 40-60 and has a tendency to decrease in the further, HDL level was decreasing as the age grew. Serum LDL level has strong direct relevance to cholesterol (r=0.720, p<0.01) and weak relevance to triglyceride (r=0.189,p<0.01). As for the sex, high- density lipoprotein level decreased for men with statistical importance (p<0.05) and there was no signifcant difference in other parameters. LDL level increased for 81.8% , increased cholesterol for 51.1%, raised triglyceride for 27.9% comparing with the normal rate but HDL level was decreased for 32.2% of the participants in the study. These changes mostly occurred at the ages of 40-60. Atherogen triad occurred for 16.5% of the participants and 13(33.3%) of whom were male and 26(66.7%) female.Conclusion:LDL and cholesterol level raised more than the normal rate comparing with other lipid parameters particularly as for 40-60 aged people and atherogen triad which leads to develop atherosclerosis occurs in 16.5% of all adults in the study.