Abstract: Flat supersymmetric space-time (x, θ) has been discussed under assumption that the Fermi variables are symplectic vectors only. We have abandoned the traditional assumption, that it must be the spinor representation of Lorentz group, which makes in the usual theory of supersymmetry.
The even and odd generators of the ortho-symplectic group OS_p(414) have been calculated concretely in its dyads representation.
New superfields, Lagrangian and the action integral, different from the usual theory, have been introduced in this flat case.