Reducing the prevalence of smoking among teenagers who smoked by increasing the rate of smoking cessation is among the feasible long term measures to reduce health problems related to smoking among Malaysian population. However, previous studies have revealed that addiction to nicotine is one of the identified barriers for adolescent smokers to quit smoking (1). Identification of their addiction levels enables the planning and administration of the appropriate measures to in crease the rate of smoking cessation. A simple and valid but not intrusive instrument is the prerequisites for the measurement of nicotine addiction among the smokers. The Fagerstrom Test for Cigarette Dependence (FTCD) which consists of six items and was modified from the Fagerstrom Tol erance Questionnaire (FTQ) is among the widely used instruments for measurement of nicotine ad diction among the smokers(2) due to its non-invasiveness, simplicity and easiness to understand and can rapidly assess nicotine dependence (3). In light of the high prevalence of smoking among adoles cents in Malaysia, and the lack of a valid instrument to measure the nicotine addiction as well as the incur of social and cultural bias if direct adaptation of the validated FTCD were used as Malay sian adolescents may interpret the items in the instrument differently from the adolescents from other countries, the present study was conducted to determine the validity and reliability of the Ba hasa Malaysia version of FTCD-BM among 130 secondary school students aged 13-16 years before it is being used to measure nicotine addiction among the Malaysian adolescents. Our study indicated that the FTCD-BM was of good construct validity as demonstrated by a good value of 0.699 from the Kaiser-Mayer-Olkin measure of sampling adequacy, a significant value from the Bartlett’s test of sphericity in the exploratory factor analysis. In addition, Varimax rotation also revealed that 41% of the variations in determining nicotine addiction among Malaysian adolescents were explained by the FTCD-BM. On the other hand, the reliability of the FTCD-BM was of moderate level with Cronbach alpha value of 0.61. Of note, to the best of our knowledge, the present study, which investigated the validation of FTCD among daily adolescent smokers, is Lim et al.: Reliability and Validity of the Fagerstrom Test for Cigarettes Dependence … Available at: http://ijph.tums.ac.ir 105 the first study in Malaysia, thus far. Using the FTCD-BM, this study revealed that 14% of the daily adolescent smokers were moderately or highly addicted to nicotine. This rate was lower than 60% as reported by Salameh and colleague (2013) (4) among university students in Lebanon, 45% among university students in USA (5) and 30% among college students in Saudi Arabia (6). However, notwithstanding the lower rate of nicotine dependence among Malaysian adolescent smokers as compared to other countries, adequate attention should be given and all possible interventional strategies and educational measures should be undertaken in order to curb or reduce the nicotine addiction level among these adolescents since many previous studies had reported that addicted adolescent smokers tend to continue their smoking behavior till their adulthood (7)