  Faddeev calculations of hypertriton ($_\Lambda^3$H) separation energy are
performed, incorporating $2\pi$-exchange $\Lambda $NN three-baryon force.
Repulsive contributions of the three-baryon force in the order of 20 keV are
found, depending on the NN interactions employed. The effect is not negligible
compared with the small separation-energy of $_\Lambda^3$H.
