A coil assembly for an induction heating device according to an embodiment of the present invention may comprise: a first coil part which has, on one surface thereof, a first cooling-pipe insertion groove indented to the inside thereof; a first cooling pipe coupled to the first cooling-pipe insertion groove so that a part of the outer surface can be exposed; a second coil part which is disposed to be opposite to one surface of the first coil part provided with the first cooling-pipe insertion groove and has, on one surface opposite to the one surface of the first coil part, a second cooling-pipe insertion groove indented to the inside thereof; and a second cooling pipe coupled to the second cooling-pipe insertion groove so that a part of the outer surface can be exposed.
