  In this paper, we study the conformally invariant field equations for
vector-spinor field in de Sitter space-time. The solutions are also obtained in
terms of the de Sitter-Dirac plane waves. The related two-point functions are
calculated in both de Sitter ambient space formalism and intrinsic de Sitter
coordinate. In order to study the conformal invariance, Dirac s six-cone
formalism is utilized in which the field equations are expressed in a
manifestly conformal way in 4 + 2 dimensional conformal space and then followed
by the projection to de Sitter space.
