Although sustainable development and sustainability have traditionally been fields of environmentalists, ecologists, politicians, and economists, many psychologists have been working in this area. Any attempt to present the psychological aspects that support sustainable development (SD), however, hasn’t been done. The aim of this paper is to present such an attempt through a conceptual framework. Firstly, a brief summary of the origin of SD is provided. Following this, SD is discussed as a ‘contestable concept’. Then, the three steps necessary to build the proposed conceptual framework are presented. These are: (1) To make a distinction between the terms ‘sustainable development’ and ‘sustainability’, arguing that sustainability should be understood as ‘environmental sustainability’, and ‘sustainable development’ as the strategies to achieve it. Next (2), following Dobson (1998, Cap. 2), ‘environmental sustainability’ is defined as the belief that parts or aspects of natural resources are not replaceable by human-made, and that at least some of these need to be maintained into the future. Also, it is assumed that environmental sustainability must be understood through utilisation and preservation environmental attitudes. And finally (3) economic, social and political are presented as the dimensions of SD. Hence, the conceptual framework is referring to the paradigm level, or deeper meaning of the SD, that underlies the surface manifestations. Or, more specifically, it attempts to get the underlying social attitudes that support SD. Briefly, the conceptual framework tries to indicate the SD dimensions, principles and indicators. The dimensions are economic, social and political; the principles are steady-state economy, egalitarianism, and democratic values; and its indicators are attitudes toward limits to economic, population and consumption growth (economic dimension), attitudes toward equal distribution of wealth, formal/legal equality, equality of opportunity, equality of rewards/results (social dimension), and attitudes toward democratic values (political dimension). Yet, these indicators are social attitudes that support SD, and it is a strategy to achieve environmental sustainability, or the utilisation/preservation environmental attitudes. In conclusion, it is argued that if individuals present these social attitudes that support SD, they would support more the preservation aspect of environmental sustainability.