A neutron scintillator excellent in neutron detection efficiency and n/γ discrimination ability, having uniform characteristics, and easily available in a large size is provided.The neutron scintillator comprises a resin composition having eutectic particles incorporated in a resin having a similar refractive index, the eutectic particles having a sphere equivalent diameter of the order of 50 to 1000 μm and being composed of lithium fluoride and an inorganic fluorescent material, such as MgF2, CaF2 or SrF2, the inorganic fluorescent material containing a lanthanoid, such as Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm or Yb, as a luminescent center atom.