To provide a method for synthesizing an allyl alcohol isomer from an allyl alcohol compound in a short time, without addition of a catalyst, and to provide an apparatus for the same.

This method for producing the allyl alcohol compound comprises synthesizing the allyl alcohol isomer from the allyl alcohol compound by using a supercritical fluid as a reaction solvent, without the addition of the catalyst. Further, the apparatus for producing the same is provided. Thus, an allyl ether isomer which is useful as a raw material for a perfume and a raw material for a pharmaceutical is efficiently mass-produced in a short time. An initial cost of a process is reduced, and further a running cost thereof is reduced, because of not using the catalyst. Further, production harmonious with the environment is realized.