  We propose a new ${\cal N}$-extended supersymmetric $su(n)$ spin-Calogero
model. Employing a generalized Hamiltonian reduction adopted to the
supersymmetric case, we explicitly construct a novel rational $n$-particle
Calogero model with an arbitrary even number of supersymmetries. It features
${\cal N}n^2$ rather than ${\cal N}n$ fermionic coordinates and increasingly
high fermionic powers in the supercharges and the Hamiltonian.
