A highly reliable winding part is provided which is capable of providing insulation with reliability. A core is attached to a bobbin along a first direction. First terminals and second terminals are disposed along the first direction. A first terminal group and a second terminal group are disposed with the core interposed between the groups. A first insulation portion or a recess along a second direction that is not parallel to the first direction is provided between the first terminals and the second terminals, and a second insulation portion or a core groove along the first direction is provided between the first terminal group and the second terminal group.