<p>There is provided a transformer (100) including: a bobbin (10) having at least one first coupling unit (70, 72) formed at one end (12) thereof; a first assembling member(20) having a second coupling unit (80, 82) formed to be selectively coupled to the first coupling unit; a first pin member (40) formed on the assembling member; and a second pin (50) member formed at the other end (14) of the bobbin (10).</p>
