This state-of- the-art article gives a synopsis of research conducted on L2 teacher beliefs. The first part of the paper presents a brief historical overview of the conceptualizations and terms used in L2 teacher beliefs. The second part of the paper provides a panorama of diverse research studies that looked into the relationships between L2 teacher beliefs and various L2 related inquiries in diverse contexts. The paper concludes arguing for a need for further research to investigate interrelationships between L2 teacher and L2 learner belief systems and their influence on learning.