In contrast with macromonomer in traditional polymer science, supramonomer refers to a monomer that is fabricated by noncovalent interactions, but is able to polymerize using conventional methods of polymerization. This communication describes the fabrication of a supramonomer based on supramolecular complexation between cucurbit[8]uril and the tripeptide Phe-Gly-Gly derivative. The supramolecular polymer is obtained by click polymerization of the supramonomer. It is expected that this line of research will provide a new method for fabricating supramolecular polymers.