The study was intended to find out the Environmental Knowledge of B.Ed. Trainees in Tamil Nadu, India. Environmental Knowledge questionnaire was constructed and validated by the investigator, have been administered to a random sample of 1200 trainees studying in B.Ed. College. The result revealed that Government and Aided B.Ed. College Trainees, Aided and Private B.Ed. College Trainees caused significant difference and Government and Private B.Ed. College Trainees caused no significant difference in respect of their Environmental knowledge.