  We show that at the leading order in the large-$N$ expansion a lattice QCD
motivated linear rising confinement potential at large distances leads to a
non-local four-quark interaction that realizes spontaneous breaking of chiral
symmetry (SBCS) in the same way the Nambu-Jona-Lasinio model does. The
dynamical quark mass $m$, which represents the solution of the gap-equation, is
proportional to the square root of the string tension $\sigma$ and takes the
form at the leading order in the large-$N$ expansion $m=2 \sqrt{\sigma}/\pi$
with $\sigma=0.27$ GeV$^2$. The Nambu-Jona-Lasinio phenomenological constant
$G_1$, which is responsible for SBCS, is expressed in terms of the string
tension and the confinement radius.
