  The mass spectrum of the chargino--neutralino sector in the minimal
supersymmetric standard model (MSSM) is calculated at the one-loop level, based
on the complete set of one-loop diagrams. On-shell renormalization conditions
are applied to determine the counterterms for the gaugino-mass-parameters $M_1,
M_2$ and the Higgsino-mass parameter $\mu$. The input is fixed in terms of
three pole masses (two charginos and one neutralino); the other pole masses
receive a shift with respect to the tree-level masses, which can amount to
several GeV. The detailed evaluation shows that both the fermionic/sfermionic
loop contributions and the non-(s)fermionic loop contributions are of the same
order of magnitude and are thus relevant for precision studies at future
colliders.
