The purpose of this paper is to generalize the Euler sequences of nonabsolute type by introducing a generalized Euler mean difference operator E r (∆ (α) ) of order α. We investigate their topological structures as well as some interesting results concerning the operator E r (∆ (α) ) for a proper fractionα. Also we obtain the α-, β-and γ-duals of these sets.Keywords: Euler sequence spaces of nonabsolute type, linear operator, matrix transformations, α-, β-and γ-duals. 2010 MSC: 46A45, 46A35, 46B45.