This paper introduces a new class T γ α,β,k (η) of analytic functions which is defined by means of a linear operator involving generalized Mittag-Leffler function H γ α,β,k (f ). The results investigated in this paper include, an inclusion relation for functions in the class T γ α,β,k (η) and also some subordination results of the linear operator H γ α,β,k (f ). Several consequences of our results are also pointed out. Mathematics Subject Classification (2010): 33E12, 30C45.