The aim of this paper is to introduce and study a new class of regular space called ξ-regular spaces by using ξ-open sets introduced by R. Devi, S.N. Rajappriya, K.M. Swamy and H. Maki in Scientiae Mathematical Japonicae (2006) and obtained several properties of such a space. Moreover, we obtained some new characterizations and preservation theorems of ξ-regular spaces.