HYDRODESULFURIZATION DEVICE, HYDROGEN GENERATION DEVICE, AND FUEL CELL SYSTEM

A hydrodesulfurization device (2) comprises a hydro-desulfurizer (3) configured to remove a sulfur component from a raw material and a heater (4) configured to heat the hydro-desulfurizer (3); wherein the hydro-desulfurizer (3) includes a plurality of blocks (31) formed by division in a circumferential direction and disposed annularly around an outer periphery of the heater (4); wherein the hydro-desulfurizer (3) is configured such that the raw material having passed through inside of each of the blocks (31) moves to its adjacent block (31); and wherein the hydro-desulfurizer is configured such that adjacent blocks (31) are communicated with each other and the raw material flows in the adjacent blocks (31) in opposite directions.