  We give the superalgebra of $N=2$ chiral (and antichiral) quantum superfields
realized as a subalgebra of the quantum supergroup $\mathrm{SL}_q(4|2)$. The
multiplication law in the quantum supergroup induces a coaction on the set of
chiral superfields. We also realize the quantum deformation of the chiral
Minkowski superspace as a quantum principal bundle.
