Sustainable food consumption, conceptualized as food consumption with sustainable values, is gaining attention by its environment-friendly and social-oriented factors. In spite of its importance, its diffusion is impeded as associated products such as organic or environment-friendly foods are more expensive than general foods, causing potential social inequity in food consumption. This study investigates how different consumptions of environment- friendly food are across income levels. Results based on a multilevel mixed-effects linear regression model show that consumption patterns for environment-friendly foods differ by income levels, and that low-income groups are more sensitive to changes in price of environment-friendly foods than high-income groups are.