A coil device(1) in which a first coil(2), a second coil(4) and a third coil(3), each having a flat plate shape, are stacked with one other, wherein the first coil has a clearance section, the third coil has a second clearance section, part or whole of a lead wire(44) drawn out from the inside to the peripheral portion of the second coil while striding over the second coil(4) as well as part or whole of a lead wires(37a, 37b) drawn out from the inside to the peripheral portion of the third coil(3) while striding over the third coil are accommodated in the clearance section, and part or whole of lead wires(27a, 26b) drawn out from the inside to the peripheral portion of the first coil(2) while striding over the first coil are accommodated in the second clearance section.
