AbstractThe main purpose of this research is to identify percentage, their relationships between obesity and lifestyle in primary schools. This research specifically identifies significant differences between Body Mass Index (BMI) in the primary school the relationship between lifestyle factors of nutrition, corelation between physical activities. This study was conducted with the participation of female students (n=380) in seven schools in negeri Kedah Darul Aman; SK Convent Father Barre, SK Kulim, SK Pendang, SK Kuala Kethil, SK Ayer Hitam, SK Titi Gajah, dan SK Langkawi. The statistical procedures used in this study included frequency, means, percentages and t- test. The result shows (n=141; 37.1 %) under weight, (n=131; 34.5 %) is normal. However (n=1; 0.3%) is over weight. There are (n=56; 14.7%) is having a risks and (n=43; 11.3%) are obes level I and (n=8; 2.1%) are obes level II. The result reveals that there is a correlation and significant between ‘Indeks Jisim Badan’ and Physica.....