Four kinds of succinoxy alkylene methacrylates with different lengths of alkylene groups were synthesized for use as bonding agents, and the bond strength of these monomers to polished dental alloys under dry and wet conditions was measured to investigate the effect of monomer structure on the bonding. There was no significant relationship between the monomer structure and the bond strength to precious alloys except for the Au-Ag-Pd alloy under dry conditions where the bond strength decreased with increase in the number of carbon atoms in the alkylene group. There was no significant relationship between the monomer structure and the bond strength to nonprecious alloys under dry conditions. However, the bond strength of the monomers with alkylene groups of 5 and 8 carbon atoms to the Ni-Cr alloy and that of those with short alkylene groups to the Co-Cr alloy, respectively, was higher under wet conditions.