We have developed artificial nails, fake nails, ethical nail tips with our 100 % natural biomass-based cellulose composite biodegradable resin (main component is PLA). It was possible to manufacture artificial nails at a mass production level with our resin with a normal injection molding machine without any petroleum-based additive. Artificial nails made by our company are made of 100 % natural biomass-based biodegradable resin. On top of that, because of porous structure owing to cellulose composite material in the resin, oxygen from the outer environment, and the moisture from the fingernail side, can go through easily. Therefore, it is very gentle to the human body. Because oxygen and moisture can go easily through their biomass artificial nails. It is suggested that swelling of fingers can be also suppressed. It is the first time in the world to make artificial nails with 100 % natural based biodegradable resin. In addition, carbon emission is 0 even when customers discard them.