BOBBIN FOR TRANSFORMER

PROBLEM TO BE SOLVED: To make it possible to easily manufacture bobbins having different winding specifications without substituting wire materials for windings on the way of winding work. SOLUTION: A connection part 5 is formed between the flange parts 21 of a bobbin body 31. A bobbin body 32 other than the body 31 is constituted so as to be fitted in a space 6 formed by the connection 5. A process for winding a primary winding 11 around the body 31 and a process for winding another secondary winding 12 around the body 32 can be completely independently executed. When plural bobbin bodies 31, 32 wound by windings of which winding turns or wire rods are mutually different are prepared, bobbins having different winding specifications can easily be manufactured.