A thin-film common mode filter is provided, comprising: a pair of magnetic plates; an upper coil conductor and a lower coil conductor formed between the pair of magnetic plates, spirally wound in the magnetic plate surface direction, and overlapped each other; an upper lead conductor and a lower lead conductor, one ends of the upper lead conductor and the lower lead conductor connected electrically to one ends in center portions of the upper coil conductor and the lower coil conductor, respectively, and extended to external portions across the upper coil conductor and the lower coil conductor; and a pedestal part formed below a connection portion between the upper coil conductor and the upper lead conductor, for lifting the connection portion to an upper position.