A probe pin includes a coil spring, a first plunger, a first end of which is inserted from a first end of the coil spring into the coil spring and a second end of which is exposed to outside of the coil spring, and a second plunger, a first end of which is inserted from a second end of the coil spring into the coil spring to be in contact with the first end of the first plunger and a second end of which is exposed to the outside of the coil spring. The second plunger includes at least one elastic arm extending from the second end of the second plunger, and a touch portion is provided at a leading end of the elastic arm and displaceable in a direction intersecting an axial center direction when pressing force in the axial center direction is applied to the touch portion.