Dissociation dynamics of temporary negative ion NF3- formed in the low-energy (0.5 to 4.5 eV) electron attachment is investigated by the anion velocity slice imaging spectroscopy. The kinetic and angular distributions of the F- fragment indicate that this fragment is produced via two distinctly different dissociation channels, namely, two-body and three-body fragmentations, at the higher electron attachment energies. The anisotropic distributions of the fast F- ions are interpreted as the two-body dissociations relevant to the E-2 resonant state of NF3-, whereas the slow F- can be produced via various three-body dissociations with the products of NF(X (3)Sigma(-)) + F + F-, NF(b (1)Sigma(+)) + F + F-, or N + F-2 + F-, depending on the electron attachment energy.