Introduction:
The nurse students are health professional who have significant role in tobacco control. Theory of planed behavior of Ajzen (1991) was used to design the conceptual framework and to explain the relationship of nurse’s attitudes for tobacco control practice, self-efficacy, social support, and the tobacco control practice of nurses.

Objectives:
The aim of this study is to investigate factors influencing tobacco control practice among the nurses who used to attend the Nursing student smoke-free Thai society club.

Methods:
A cross-sectional descriptive study was used. A total of 100 registered nurses who used to attend the nursing student smoke-free Thai society club were included in the study after sample random sampling method. A semi-structured questionnaire was given to them and the 96 responses were analyzed. The 50 items from 5 parts of questionnaire comprised demographic details, nurse’s attitudes for tobacco control practice, self-efficacy, social support, and the tobacco control practice of nurses. The reliability of questionnaire was 0.85. Descriptive and multiple regression analysis was used for data analysis.

Results:
The participants have high level of attitudes for tobacco control practice, social support, and tobacco control practice. However, they have middle level of self-efficacy. The finding showed a significant positive association of self-efficacy (p < .01), social support (p = .003), and the tobacco control practice of nurses. Moreover, nurses’ attitudes for tobacco control practice, self-efficacy and social support have explained the variance of the tobacco control practice of nurses at 25.6%.

Conclusions:
The findings have benefit for development of empowerment program for the nurse students who attending the nursing student smoke-free Thai society club in the future. The program should improve nurse students’ self-efficacy and organized social support. Therefore, nurse students will have excellence preferment in tobacco control practice after they graduated.

Funding:
This work was supported by Thai Health Promotion Foundation by Nurse Network for Tobacco Control in Thailand, Nurse Association Thailand