Reactor

A reactor comprising:

• a coil having a winding portion;
• a magnetic core that is disposed inside and outside the winding portion;
• and
• a case that houses an assembly including the coil and the magnetic core,
• wherein the magnetic core includes a plurality of core pieces that are assembled so as to form a closed magnetic circuit,
• the core pieces include two outer core pieces that include a portion disposed outside the winding portion,
• the case includes, on an inner wall surface thereof, a first opposing face and a second opposing face that are respectively opposed to outer edge faces of the outer core pieces, and includes a case inclined surface that is provided on at least one of the first opposing face and the second opposing face,
• the case inclined surface is inclined such that a distance between the first opposing face and the second opposing face decreases from an opening side of the case toward an inner bottom face of the case, and
• a core inclined surface is provided on the outer edge face side of the outer core piece, and is in surface contact with the case inclined surface.