The main objective of this paper was to provide much needed information on the influence of family background and peer pressure as presage of cigarette smoking among undergraduate students in Nigeria, as this is relevant to the quality and longevity of life of citizenry. The study used descriptive survey research design. The population of the study were the male students of Lagos state University. The simple random sampling was the technique used in selecting the valid respondents. A representative sample (n=7,757) of the total LASU undergraduate student population of 13,343. The sample size was a total of three hundred and eighty (380). From the findings gotten, it was shown that 52.4% were more likely to smoke if their friends are around. About having siblings and other family members that smoke cigarette 29.7% of respondent strongly agreed and 32.9% of the respondent agreed while 52.4% of the respondent learnt how to smoke from their parents and siblings. The study concludes that the most serious health outcomes associated with smoking typically emerge later in life, studies have shown that the earlier individuals begin to smoke, the higher their risk for diseases and nicotine addiction. It was suggested that attitudinal reorientation be made available for undergraduate students against cigarette smoking to avoid health challenges.