A method for producing aromatic hydrocarbons, the method comprising the steps of: thermally cracking a raw material consisting of a naphtha fraction or a kerosene/diesel oil fraction using an ethylene production apparatus to obtain a thermally cracked heavy oil; selectively hydrogenating bicyclic aromatic hydrocarbons in the thermally cracked heavy oil and converting to monocyclic aromatic hydrocarbons to obtain a hydrogenation-treated oil in the presence of hydrogen using a catalyst for hydrogenation treatment under the conditions of a hydrogen partial pressure of 0.7 MPa to 20 MPa, a LHSV of 0.05 h -1 to 2 h -1, a reaction temperature of 200°C to 450°C and a hydrogen/oil ratio of 100 NL/L to 2000 NL/L; and bringing a feedstock containing the hydrogenation-treated oil into contact with a catalyst for monocyclic aromatic hydrocarbon production containing a crystalline aluminosilicate in the absence of molecular hydrogen to induce a cracking reforming reaction, wherein the end point of the distillation characteristics of the feedstock is 400°C or lower, measured according to the "distillation test method for petroleum products" stipulated in JIS K 2254, the reaction pressure employed when the feedstock is brought into contact with the catalyst for monocyclic aromatic hydrocarbon production to react therewith in the cracking reforming reaction step is set to 0.1 MPaG to 1.5 MPaG, and the catalyst for hydrogenation treatment is a catalyst containing at least one metal selected from the metals of Group 6 in the Periodic Table of Elements, and at least one metal selected from the metals of Group 8 to Group 10 of the Periodic Table of Elements. thermally cracking a raw material consisting of a naphtha fraction or a kerosene/diesel oil fraction using an ethylene production apparatus to obtain a thermally cracked heavy oil; selectively hydrogenating bicyclic aromatic hydrocarbons in the thermally cracked heavy oil and converting to monocyclic aromatic hydrocarbons to obtain a hydrogenation-treated oil in the presence of hydrogen using a catalyst for hydrogenation treatment under the conditions of a hydrogen partial pressure of 0.7 MPa to 20 MPa, a LHSV of 0.05 h -1 to 2 h -1, a reaction temperature of 200°C to 450°C and a hydrogen/oil ratio of 100 NL/L to 2000 NL/L; and bringing a feedstock containing the hydrogenation-treated oil into contact with a catalyst for monocyclic aromatic hydrocarbon production containing a crystalline aluminosilicate in the absence of molecular hydrogen to induce a cracking reforming reaction, wherein the end point of the distillation characteristics of the feedstock is 400°C or lower, measured according to the "distillation test method for petroleum products" stipulated in JIS K 2254, the reaction pressure employed when the feedstock is brought into contact with the catalyst for monocyclic aromatic hydrocarbon production to react therewith in the cracking reforming reaction step is set to 0.1 MPaG to 1.5 MPaG, and the catalyst for hydrogenation treatment is a catalyst containing at least one metal selected from the metals of Group 6 in the Periodic Table of Elements, and at least one metal selected from the metals of Group 8 to Group 10 of the Periodic Table of Elements.