A choke coil, comprising: a coil main body including a magnetic body and a winding wire (6, 7), the magnetic body forming a closed magnetic circuit in which an upper yoke and a lower yoke are arranged side by side along a z-axis direction, and a first pier column and a second pier column are arranged side by side along a y-axis direction orthogonal to the z-axis direction, the winding wire being wound around at least one of the first pier column and the second pier column; and a connector connection line (10, 11) configured to connect the winding wire and a connector conductor (8, 9), the coil main body being arranged and the connector conductor being arrangeable parallel to an x-axis direction orthogonal to the z-axis direction and orthogonal to the y-axis direction, characterized in that the connector connection line includes: a first connection line led out from the connector conductor side of the coil main body of the winding wire along the y-axis direction away from the coil main body; a second connection line led out from the first connection line at a corner portion of the first pier column or the second pier column along the x-axis direction away from the connector conductor; a third connection line led out from the second connection line along the z-axis direction toward the lower yoke; and a fourth connection line led out from the third connection line along the x-axis direction toward the connector conductor. a coil main body including a magnetic body and a winding wire (6, 7), the magnetic body forming a closed magnetic circuit in which an upper yoke and a lower yoke are arranged side by side along a z-axis direction, and a first pier column and a second pier column are arranged side by side along a y-axis direction orthogonal to the z-axis direction, the winding wire being wound around at least one of the first pier column and the second pier column; and a connector connection line (10, 11) configured to connect the winding wire and a connector conductor (8, 9), the coil main body being arranged and the connector conductor being arrangeable parallel to an x-axis direction orthogonal to the z-axis direction and orthogonal to the y-axis direction, characterized in that the connector connection line includes: a first connection line led out from the connector conductor side of the coil main body of the winding wire along the y-axis direction away from the coil main body; a second connection line led out from the first connection line at a corner portion of the first pier column or the second pier column along the x-axis direction away from the connector conductor; a third connection line led out from the second connection line along the z-axis direction toward the lower yoke; and a fourth connection line led out from the third connection line along the x-axis direction toward the connector conductor. a first connection line led out from the connector conductor side of the coil main body of the winding wire along the y-axis direction away from the coil main body; a second connection line led out from the first connection line at a corner portion of the first pier column or the second pier column along the x-axis direction away from the connector conductor; a third connection line led out from the second connection line along the z-axis direction toward the lower yoke; and a fourth connection line led out from the third connection line along the x-axis direction toward the connector conductor.