Output-noise reduction device

An output-noise reduction device configured to reduce noise mixed in an output signal output from an electronic device accommodated in a metal casing to a supplying device, the output-noise reduction device comprising:

• a conducting bar that is made of a conductive material, and has one end portion serving as a connection terminal to be connected to an output end of the electronic device, and another end portion serving as an output terminal;
• a first magnetic body core that is made of a magnetic material and includes a through hole through which the conducting bar is inserted;
• a molded member that is made of a resin material and encapsulates a portion of the conducting bar excluding the connection terminal and the output terminal and the first magnetic body core;
• and
• a first mounting board that is encapsulated by the molded member, and includes:
• a first fixing portion fixed to a portion of the conducting bar between the first magnetic body core and the output terminal;
• a second fixing portion connected to the metal casing;
• and a first connecting portion with a capacitive element connecting between the first fixing portion and the second fixing portion,
• wherein a section from the output terminal to at least part of a main body portion including a capacitive component of the capacitive element mounted on the first mounting board is isolated from electromagnetic coupling from the electronic device.