A spring connector with waterproofing function includes a conductive tube having a distal end that is a contact part to be contacted with an object at one side; a conductive pin having a distal end that is a contact part to be contacted with an object at the other side, and protruded from an opening at a base end of the conductive tube; a spring held inside the conductive tube, and pressing the conductive pin to urge the conductive pin so as to protrude from the conductive tube; and an elastic member having a hole into which the conductive tube is inserted to be brought into tight contact with a side face of the conductive tube, the elastic member being spread in a flange-like shape from the side face of the conductive tube.