Reactor

A reactor comprising:

• a coil having winding portions;
• a magnetic core including inner core portions arranged inside of the winding portions and a pair of outer core portions arranged outside of the winding portion so as to sandwich the inner core portions;
• end surface interposed members including main body portions that are interposed between end surfaces of the winding portions and the outer core portions, and resin filling holes that communicate with the interiors of the winding portions;
• inner resin portions that fill spaces between inner circumferential surfaces of the winding portions and the inner core portions;
• and
• outer resin portions that cover at least part of the outer core portions and are connected to the inner resin portions through the resin filling holes,
• wherein at least one of a pair of the outer core portions and an end surface interposed member are constituted by a core component that is formed integrally, and
• the end surface interposed member of the core component includes a core holding portion that is extended from the main body portion to the outer core portion side, the outer core portion being interposed between the core holding portion and the main body portion.