We consider quantum deformations of the real symplectic (or anti-De Sitter) algebra sp(4, ~ ) ~-spin(3, 2) and of its singleton and (4-dimensional) zero-mass representations. For q a root of -1, these representations admit finite-dimensional unitary subrepresentations. It is poin ted out that Uq( sp( 4, ~ )), unlike Uq( SU( 2, 2)), contains Uq(Sl2) as a quantum subalgebra.