A descriptive cross sectional study was conducted among single group nursing officers working in JIPMER hospital, Puducherry in morning and general shift. The result was calculated using expected proportion level of happiness from previous study which showed 28.9% of nurses having very good level of happiness. The sample size estimated using 10% precision, 5% significance level and sample size is 274, rounded of to 275. The sampling technique used was simple random sampling. The data was collected by using Oxford happiness scale questionnaire and association with demographic variables was done like- age, gender, education, years of experience, occupation, family income, marital status, and type of family. Overall it took around 15-20 minutes only. After one week, same nursing officers were asked to assemble in a common place at the same time. The same questionnaire was given to them to assess the reliability of the tool – by test and re-test method.Descriptive statistics, mean, standard deviation and t test were used to statistically analyze the data. Mean value of happiness was 66 +_ 0.365, there was no significant correlation between happiness and socio demographic variables like- age (P=0.84), gender (P=0.26), occupation (P=0.60), education (P=0.61). However there was a significant relationship between years of experience and happiness level (P=0.047)