The aim of this paper is to study the types of conceptual integration networks constructed by the operation of conceptual blending on the base of the conceptual blending theory. The conceptual blending theory, developed by Fauconnier & Turner(1994, 1998, 2002) and Fauconnier(1997), posits the four-space network consisting of two input spaces, the generic space, and the blended space. Conceptual blending is a cognitive process which is the combination of input space construction, cross-space mapping, and selective projection. The meaning of language is constructed by the operation of conceptual blending. In chapter 2, I deal with the difference between conceptual blending theory and conceptual metaphor theory, specifying the nature and structural characteristics of conceptual blending. In chapter 3, I present the four types of conceptual integration networks with specific examples and investigate the way the networks are constructed. These integration networks are divided based on two dimensions; (i) whether all mental spaces in the network share a common frame, (ii) whether two input spaces are involved in the construction of emergent structures in the blended space.