  It is argued that the pairing symmetry realized in a ferromagnetic
superconductor UGe$_2$ must be a non-unitary triplet pairing. This particular
state is free from the Pauli limitation and can survive under a huge internal
molecular filed. To check our identification we examine its basic properties
and several experiments are proposed. In particular, the external field is used
to raise $T_c$ by controlling the internal spontaneous dipole field.
