According to one exemplary embodiment of the present invention, there is
provided an intake device of an internal combustion engine, having a
plurality of intake passages for introducing an intake gas into a row of
engine cylinders, respectively; and a secondary gas passage for
introducing a secondary gas into the intake passages. The secondary gas
passage includes a main gas channel, an adjacent gas channel extending
downstream from the main gas channel adjacently and substantially in
parallel with the main gas channel, and branch gas channels branching off
from the adjacent gas channel and continuing to the intake passages.