Abstract: The Critical State Soil Mechanics (CSSM) is globally known as useful tool and framework for the behavior of saturated soils such as clay and sand. The importance of knowledge in CSSM of residual soil is needed in Malaysia, since, most of the soil in Malaysia is a residual soil. This study summarizes the critical state parameters of residual soils were obtained by different researchers who have conducted at several location in the world. The critical state parameters such as stress ratio M in q-p= space, Γ as the intercept at v-lnp= space, λ as a slope of critical-state line in v-lnp= space and k as a slope of rebound curve or line in v-lnp= space. Therefore, the information of this summarize study will develop a clear vision and guidance for new researchers and civil engineering activities.