Abstract: A coil component including a core part and a coil part formed by winding a conductor in a coil form, in which the coil part is inside of the core part. The core part has a center pole part positioned in an area surrounded by an inner diameter of the coil part. The center pole part includes a first center pole part and a second center pole part each having different predetermined configurations, or the center pole part includes soft magnetic metal particles having predetermined deflection angles and aspect ratios.

Abstract: A coil device including: a core, including a magnetic powder and a resin; an air-core coil; a lead, led from the air-core coil; and a terminal, in which at least the entire air-core coil is buried inside the core, an outer shape of the core is a shape where at least one corner part is removed from an approximate rectangular parallelepiped shape, the removed corner includes an entire side of the approximate rectangular parallelepiped shape in the removed corner, approximately parallel to a direction of a winding axis of the air-coil, and a volume of the removed part is 2% or more of a volume of the approximate rectangular parallelepiped shape, is provided. The coil device can reduce a used amount of the magnetic body while maintaining the magnetic characteristic.