The purpose of the current study is to examine the factors influencing Physical Education (PE) teachers' use of motivational strategies in the PE classes. Using Self-Determination Theory (SDT; Deci, Ryan, 1985a) as a theoretical framework, this study determines if teachers' autonomous causality orientation, perceived job pressure and perceptions of student selfdetermined motivation, need satisfaction and self-determined motivation predict PE teachers' use of the motivational strategies that facilitate competence, autonomy and relatedness. A total of 101 PE teachers took part in the study. The results of the hierarchical multiple regression found that teachers' autonomous causality orientation, their perceptions of student self-determined motivation, need satisfaction and self-determined motivation, were positive and significant predictors of teachers' use of motivational strategies the PE classroom. The perceptions of job pressure did not predict the use of motivational strategies among the PE teachers in Singapore. Overall, the results showed the three step regression models predicted a total of 38 % variance in teachers' use of motivational strategies in the PE classroom. Therefore, it is important to take into consideration the provision of a working environment for PE teachers where their needs of autonomy, competence and relatedness are facilitated.