Electronic pen

An electronic pen of a capacitive system, comprising:

• a coil spring that is configured to expand and contract, and has electrical conductivity;
• a core body having electrical conductivity;
• a writing pressure detector having a fitting part fitted to an end of the core body on a side of the core body that is opposite to a side of the core body that includes a pen tip;
• and
• an electronic circuit that includes an oscillating circuit, wherein the electronic circuit, in operation, causes a detection result from the writing pressure detector to be included in a signal from the oscillating circuit,
• wherein:
• the core body penetrates through a center axis of the coil spring,
• in a state in which a writing pressure is not applied to the core body, the core body is not biased by the coil spring,
• a first end of the coil spring on a side of the coil spring adjacent to the pen tip is connected to the core body, and
• a second end of the coil spring is connected to the electronic circuit.