An apparatus and method for producing hydrocarbons including aromatic hydrocarbons and lower olefins including propylene from CH4 and CO2 through CO and H2 with high activity and high selectivity. The apparatus is provided with: a synthetic gas production unit to which a gas containing CH4 and CO2 is supplied from a first supply unit, and which generates a synthetic gas containing CO and H2 while heating a first catalyst structure; a production unit to which the synthetic gas is supplied and which generates hydrocarbons including aromatic hydrocarbons having 6-10 carbon atoms and lower olefins including propylene while heating a second catalyst structure; and a detection unit which detects propylene and the aromatic hydrocarbons discharged from the production unit, in which the first catalyst structure includes first supports having a porous structure and a first metal fine particle in the first supports, the first supports have a first channels, the first metal fine particle is present in the first channels, the second catalyst structure includes second supports having a porous structure and a second metal fine particle in the second supports, the second supports have a second channels, and a portion of the second channels have an average inner diameter of 0.95 nm or less.