  We study the Q^2 evolution of the nucleon's chiral-odd twist-3 distribution
h_L(x,Q^2) starting from the MIT bag model calculation. A simple GLAP equation
for h_L(x,Q^2) obtained at large N_c is used for the Q^2 evolution. The
correction due to the finite value of N_c is O(1/N_c^2)\sim 10% level. It turns
out that the twist-3 contribution to h_L(x,Q^2) is significantly reduced at
Q^2=10 GeV^2 in contrast to the g_2(x,Q^2) case. This is due to the fact that
the corresponding anomalous dimension for h_L is larger than that for g_2 at
small n (spin).
