Environmental problem due to environmental pollution and CO2 emission has brought a strong attention on issues of sustainable urban development in urban planning area. Many urban planning researches have been argued that 'decentralized concentration' is one of the key issues for the sustainable urban spatial structure. Decentralized city is to create sustainable urban structure by realizing the supply system for urban energy efficiency through restriction of car use, proper urban density, and mixed-use. This study aims at exploring the concept of 'decentralized concentration' and comparing its characteristics of 'decentralized concentration' urban structure found in urban planning theories.

Abstract
 1. Introduction
 2. Theoretical study
 3. The concept of decentralized concentration in the urban plan theory
 4. Conclusion
 References

• Lee Hyun Jun(School of Architecture, Chonnam National University)
• Yoo Uoo Sang(School of Architecture, Chonnam National University) Corresponding Author