Objectives : The purpose of this study is to establish guideline for tooth whitening by investigating the awareness towards tooth whitening. Methods : The subjects were recruited in Seoul and Gyeonggi-do from June to August, 2011. A total of self-reported 395 questionnaire data were analyzed except for 5 incomplete answers. Results : 1. Smoking and coffee had no significant influence on the intention to whiten the tooth according to gender(p<0.001), age(p<0.001) and marital status(p<0.001). 2. Seventy persons (64.8%) tried to whiten tooth for color change. Half of the respondents (50.0%) bleached teeth by themselves. Of 295 persons, 66 persons (61.1%) were satisfied with self-whitening of teeth. Conclusions : Majority of the respondents wanted to whiten their teeth and they tried whiten by themselves because the whitening procedure was easy to do. It is necessary to establish the guideline for whitening teeth for safety.