  A covariant quantization of the free spinor fields (s=1/2) in 4-dimensional
de Sitter (dS) space-time based on analyticity in the complexified
pseudo-Riemanian manifold is presented. We define the Wigthman two-point
function ${\cal W}(x,y)$, which satisfies the conditions of: a) positivity, b)
locality, c) covariance, and d) normal analyticity. Then the Hilbert space
structure and the field operators $\psi (f)$ are defined. A
coordinate-independent formula for the unsmeared field operator $\psi (x)$ is
also given.
