Disclosed are a coil component capable of securing insulation between primary and secondary coils while being miniaturized, a mounting structure thereof, and an electronic device having the same. The coil component includes a bobbin including a winding part around which coils are wound and first terminal fastening parts fastened to a plurality of first connection terminals; and a second terminal fastening part including terminal blocks protruded from the bobbin and a plurality of second connection terminals fastened to the terminal blocks, wherein the second terminal fastening part is mounted on a substrate while being spaced apart from the bobbin after the coils are wound therearound.