The purpose of the study is to investigate whether there is a relationshipbetween project team members' perceptions of transformative leadership behaviorsand intrinsic motivation based on Self-Determination Theory (SDT).Transformative leadership behaviors and the three components of SDT; autonomy,competence, and relatedness were examined through a quantitative method. Across-sectional study was conducted where a survey was distributed to respondentsbased on the study's selected sample. The collected data amounted to 101 responseswhich were then analyzed using the statistical analysis tool JASP. The results of the study show that transformative leadership behaviors explain31% of intrinsic motivation. The variable with the strongest unique significantrelationship with transformative leadership behaviors is autonomy with a beta valueof 0.31. Transformative leadership behaviors show a significant relationship withrelatedness in the study and explain 27%. The competence component shows nosignificant relationship with transformative leadership behaviors in this study. Theresults contribute to important insights into the leader's ability to motivate projectmembers and can be seen as an encouragement for organizations and projectmanagers to consider in future project implementations.