In order to discuss the effect of dynamic modulation caused by hydrogen-bonded system on the conduction property, two Ni(dmit)2salts were prepared. In morpholinium salts a remarkable structural modulation was observed on the hydrogen-bonded Ni(dmit)2molecules. In the crystal of hydrated lithium salts, the hydrogen-bonded cation system is incorporated in a cylindrical channel constructed by corrugatedly stacked Ni(dmit)2columns, and a distinct hysteresis was observed on the temperature dependence of conductivity.