Background: Teenager including students are vulnerable to do smoking behavior. Riskesdas’result in 2007, 2010, and 2013 also showed that smoking age was first highest in the age group of 15-19 years. Smoking behavior is a health hazard for active or passive smokers and one of the impacts of it on health is insomnia. Insomnia is a sleep disorder which is difficult to start or maintain sleep. This study aims to determine the relationship between smoking behavior with the incidence of insomnia. Methode : The method that was used in this study was a quantitative methode with an observational analytic design with cross sectional approach using chisquare. Result: The number of samples in this study amounted to 82 members of KMKS 2013-2015. The incidence of insomnia was assessed using a KSPBJ-Insomnia Rating Scale questionnaire. From the questionnaire, the result is that the smokers respondents who experienced insomnia were 10.97% and who did not experience insomnia were 20.74%. Non smokers respondents who experienced insomnia were 3.65% and who did not experience insomnia were 66.64%. The result of data analysis using Fisher's test shows p value = 0,001. Conclusion: There was a significant relationship between smoking behavior and incidence of insomnia in KMKS members 2013-2015