Introduction:
Construction workers are more likely to smoke than the general people and have been found that they had a highest pooled prevalence of smoking. Community based health promotion approach was applied to reduce the consumption of tobacco by improving the knowledge on tobacco smoking.

Objectives:
The aim of this study was to reduce tobacco smoking among construction workers by giving them the proper knowledge on tobacco smoking through a community based health promotion approach.

Methods:
The study sample consists of 48 construction workers and pretesting and post-testing method was applied. The study carried out for three months. Discussions, posters, presentations and success stories were used to improve workers' knowledge on tobacco smoking. Construction workers were made aware about chemicals, possible harms, chemical effects, tobacco industry strategies and social problems regarding tobacco smoking.

Results:
Out of the workers 87.5%, 79.2%, 60.4% and 10.4% of workers have been “ever consumed” betel, cigarettes, bidi and smokeless tobacco respectively. Before the intervention majority of workers were daily consumers which is 34.2%. After the intervention only 17.8% of workers were daily consuming cigarettes. Majority of workers used 4 cigarette buds per day which is 11.0%. After the intervention 17.8% of workers consume 1 cigarette bud per day. Before the intervention there were 2.7% of workers who consumed 10 cigarette buds per day but after the intervention highest number of cigarette buds consumed per day was six buds per day which is 1.4%. Before the intervention majority wanted to reduce the smoking which is 24.7% and after the intervention majority wanted to quit smoking which is 34.2%. After the intervention, 8.2% of the workers responded to reduce the usage and 4.1% has completely stopped smoking.

Conclusion(s):
A community based health promotion approach by providing proper knowledge on tobacco smoking can be applied to reduce tobacco smoking among construction workers.