The invention provides monomers useful for dental materials, and provides compositions, dental materials, kits and the like. The dental monomer includes a compound in which a core (X) and a specific terminal group (Y2) are bonded to each other directly or via the linking group (Z) below, wherein the core (X) is a C1-200 polyvalent organic group having a valence of not less than 3 containing an oxygen atom or a nitrogen atom in which an atom bonded to the terminal group (Y2) or the linking group (Z) is the oxygen atom or the nitrogen atom； the terminal group (Y2) is a specific (meth)acryloyl group-containing group (Y3), a (meth)acryloyl group, a C1-20 hydrocarbon group or a hydrogen atom, and the terminal group (Y2) needs to meet specific requirements； and the linking group (Z) is a specific divalent group, and when the compound contains a plurality of linking groups (Z), the linking groups (Z) may be the same as or different from each other.
