This study was carried out to explore whether or not pre-service mathematic teachers’ opinions and attitudes about environmental issues do change according to their socio-economic status. This study is descriptive in nature. An inventory comprising of both open-ended questions and a Likert-scale questionnaire to investigate students’ opinions and attitudes about environment was used to collect data. They was administered to 123 students totally. Results showed that pre-service mathematics teachers were considering that the most important environmental problems were global warming, drought, climate change and the pollution of environment. Moreover, it was found that pre-service mathematic teachers had moderate attitudes about the environment, although they had upper level opinions on it.