The Article was about the study of environmental ethic among the high school students 400 samples were collected from16 different schools in Theni District. Simple random sampling technique was used to collect the sample from various school the data collection standardized tools prepared by Dr. Mrs. Haseen Taj (1971). Environmental Ethic deepens on some factors like Gender, Medium of instruction, Region and School Management these are all the dependent variables. The significant difference between the means of each pair of groups is computing using standard deviation, T-test, one-way ANOVA, and Correlation. The findings are established and tabulated from the analyzed data. The finding shows that higher level of Environmental Ethic in Tamil Medium school students is greater than the English medium school students. According to the results and the present study concludes the level of environmental ethics is high in Tamil medium school students compare to the English medium school students.