We have developed a technique for mass production of metal-complex-type organic nanotubes (ONTs). Just mixing an aqueous solution of metal salt and an alcohol suspension of peptide lipid gives the metal-complex-type ONTs. Exchange of proton of the lipids and metal cations occurs rapidly, and the original plate structures of the lipids convert into the nanotube structures within a few minutes. We can obtain more than 100 g dry nanotubes from 1 L solvent just by filtration. These metal-complex-type ONTs are expected to apply in various fields such as medical, health, nano-biotechnologies, and electronics. For example, metal cations on the surfaces can be connecting sites of various materials such as functional molecules and biological macromolecules. Metal cations both on the surfaces and in-between the layers can be also good templates for metal nanostructures.