The complexity of teachers' tasks often affects teacher well-being, which plays a crucial role in learning effectiveness and education quality. Leadership style, trust in leader, and organizational climate are some factors influencing teacher well-being. This study aims to examine the effect of transformational leadership and trust in leader on teacher well-being with organizational climate as a mediating variable. The subjects of this study were 70 teachers teaching at XYZ school in Tangerang. The research design used is PLS-SEM with a quantitative approach. The results of the study indicate that transformational leadership positively affects teacher well-being, trust in leader not positively affects teacher well-`being, and organizational climate positively affects teacher well-being. / Kompleksitas tugas guru seringkali mempengaruhi teacher well-being, yang memegang peranan penting terhadap efektivitas pembelajaran dan kualitas pendidikan. Gaya kepemimpinan, trust in leader dan organizational climate adalah beberapa faktor yang mempengaruhi teacher well-being. Penelitian ini bertujuan untuk mengetahui pengaruh transformational leadership dan trust in leader terhadap teacher well-being dengan organizational climate sebagai variabel mediasi. Adapun subjek penelitian adalah 70 guru yang mengajar di sebuah sekolah swasta XYZ di Tangerang. Desain penelitian yang digunakan adalah PLS-SEM dengan pendekatan kuantitatif. Hasil penelitian yang diperoleh menunjukkan bahwa transformational leadership mempengaruhi teacher well-being secara positif, trust in leader tidak mempengaruhi teacher well-being secara positif, dan organizational climate mempengaruhi teacher well-being secara positif.