Photochromic optical material for the polymerizable composition

Photochromic optical material for the polymerizable composition of the present invention are ethylene with a polymerizable monomer having two or more ethylenically unsaturated groups and (A), has one (meth) acrylic group, and an aromatic ring systems unsaturated polymerizable monomer (B), and a polythiol (C) having three or more mercapto groups, a photochromic compound and (D), comprises a polymerizable monomer (a) and polymerizable monomer the total number of moles of the ethylenically unsaturated group contained in the dimer (B), the number of moles of the mercapto group contained in the polythiol (C) is 0.3 times or less.