Reactor

A reactor comprising:

• a coil that includes a wound portion;
• and
• a magnetic core that is arranged inside of the wound portion and outside of the wound portion,
• wherein the magnetic core is formed by combining a plurality of core pieces,
• at least one core piece of the plurality of core pieces is a first core piece that includes a molded body of a composite material and a non-magnetic member, the molded body of the composite material containing a magnetic powder and a resin,
• the non-magnetic member is held by the molded body of the composite material such that the non-magnetic member and the molded body constitute a single piece,
• the non-magnetic member includes a base portion that is arranged along an outer peripheral surface of the molded body of the composite material and a protruding piece that protrudes from the base portion, and
• the protruding piece is inserted into a region of the molded body of the composite material that is arranged inside of the wound portion, such that the protruding piece intersects an axial direction of the first core piece.