Introduction:
Cigarettes are one of the biggest causes of death in the world. Near 1.7% of smokers start smoking at the age of 5-9 years and the highest start smoking in the age group of 15-19 years (43.35%). The prevalence of smoking increased every day for ages 25-34 years 29% to 31.1%. The increase occurred in the 15-24 years age group from 17.3% to 18.6%. A large number of smokers in their teens make the Surabaya government has an innovation to create a non-smoking area to reduce the effect of smoking on teenagers. The prevalence of non-smoking in the Ampel and Sidotopo districts is still below 60%. Therefore it is necessary to strengthen the no smoking area for teenagers.

Objectives:
The aim was to know the knowledge of teenagers before and after health promotions regarding non-smoking area.

Methods:
This research method uses descriptive study, before and after (pre and post-test) giving health promotion (counseling and giving posters) regarding areas without smoking. Subjects were high school class students randomly in the Sidotopo and Ampel districts with a total of 30 participants.

Results:
The results show that before being given a health promotion regarding non-smoking area, only around 30% got all the questions correctly. However, after being given an intervention, as many as 80% of students have answered correctly

Conclusion(s):
It is necessary to increase education and health promotion of the local health community and teachers to clarify the role of the non-smoking area for the community, especially teenagers.