A method for producing a phenyl propane-based compound comprising a step of producing a phenyl propane-based compound by causing enzymes derived from microorganisms of the genus Novosphingobium to act on biomass containing lignins in the presence of NAD and reduction type glutathione, wherein the microorganisms of the genus Novosphingobium are Novosphingobium species MBES04 (deposition number: NITE AP-01797), and the enzymes are a combination of enzymes described in shown below and enzymes described in shown below as well as enzymes described in shown below and/or enzymes described in shown below: Short-chain dehydrogenase/reductase that belongs to the Rossmann-fold NAD (+) binding protein super family, has Multi-domain of PRK06194 and oxidizes the Cα carbon of guaiacylglycerol-β-guaiacyl ether; Glutathione S-transferase that has Multi-domain of PRK 15113 and maiA at the side of Gst and the N-end; Glutathione S-transferase that has Multi-domain of PRK 10387 and maiA at the side of Gst and the N-end; Glutathione S-transferase that has Multi-domain of Gst, PRK11752, PRK15113 and maiA; and the enzyme of is an enzyme having an amino acid sequence with at least (≥) 90% identity to an amino acid sequence as defined in the sequence listing with sequence number 1 or sequence number 2; the enzyme of is either C10G0076 having an amino acid sequence as defined in the sequence listing with sequence number 3 or C10G0077 having an amino acid sequence as defined in the sequence listing with sequence number 4; the enzyme of is C10G0078 having an amino acid sequence as defined in the sequence listing with sequence number 5; and the enzyme of is C10G0075 having an amino acid sequence as defined in the sequence listing with sequence number 6; and the phenyl propane-based compound is expressed by general formula where R represents 1, 2 or morealkyl groups or alkoxy groups having 1 to 5 carbon atoms or hydrogen atoms. the microorganisms of the genus Novosphingobium are Novosphingobium species MBES04 (deposition number: NITE AP-01797), and the enzymes are a combination of enzymes described in shown below and enzymes described in shown below as well as enzymes described in shown below and/or enzymes described in shown below: Short-chain dehydrogenase/reductase that belongs to the Rossmann-fold NAD (+) binding protein super family, has Multi-domain of PRK06194 and oxidizes the Cα carbon of guaiacylglycerol-β-guaiacyl ether; Glutathione S-transferase that has Multi-domain of PRK 15113 and maiA at the side of Gst and the N-end; Glutathione S-transferase that has Multi-domain of PRK 10387 and maiA at the side of Gst and the N-end; Glutathione S-transferase that has Multi-domain of Gst, PRK11752, PRK15113 and maiA; and Short-chain dehydrogenase/reductase that belongs to the Rossmann-fold NAD (+) binding protein super family, has Multi-domain of PRK06194 and oxidizes the Cα carbon of guaiacylglycerol-β-guaiacyl ether; Glutathione S-transferase that has Multi-domain of PRK 15113 and maiA at the side of Gst and the N-end; Glutathione S-transferase that has Multi-domain of PRK 10387 and maiA at the side of Gst and the N-end; Glutathione S-transferase that has Multi-domain of Gst, PRK11752, PRK15113 and maiA; and the enzyme of is an enzyme having an amino acid sequence with at least (≥) 90% identity to an amino acid sequence as defined in the sequence listing with sequence number 1 or sequence number 2; the enzyme of is either C10G0076 having an amino acid sequence as defined in the sequence listing with sequence number 3 or C10G0077 having an amino acid sequence as defined in the sequence listing with sequence number 4; the enzyme of is C10G0078 having an amino acid sequence as defined in the sequence listing with sequence number 5; and the enzyme of is C10G0075 having an amino acid sequence as defined in the sequence listing with sequence number 6; and the phenyl propane-based compound is expressed by general formula where R represents 1, 2 or morealkyl groups or alkoxy groups having 1 to 5 carbon atoms or hydrogen atoms.