Edward O. Wilson has described 21st century as century of environment (Buell 3). rnThe latest developed theory named 'Eco criticism theory' studies about nature and environment. It studies on earth centered approach to literary studies. It studies the relations among writers, texts and the society. It looks closely at the human, culture, nature interaction in texts. Kalidasa has earned name and fame through his poems and dramas in Sanskrit literature. His approach to nature and study of human psychology in his creative works with his best poetical style has placed him respectfully into world literature. This paper will study Kalidasa as an eco-critical poet with reference to his poems.