Disclosed is a novel terminal unit that can inhibit the shaving of plating of a columnar connecting part or cylindrical connecting part.　This terminal unit 10 comprises: a first terminal 12 having a columnar connecting part 16, and a resin cap 24, the maximum outer diameter dimension of which is made greater than the outer diameter dimension of the columnar connecting part 16; and a second terminal 14 having a cylindrical connecting part 18 that is elastically deformable in the radial direction. The columnar connecting part 16 can be attached to the cylindrical connecting part 18 by press-fitting. In a state in which the resin cap 24 is positioned inside the cylindrical connecting part 18, the cylindrical connecting part 18 is caused to undergo diameter expansion deformation by the resin cap 24, thereby pushing second side contacts 56a, 56b provided to an inner peripheral surface 20 of the cylindrical connecting part 18 in a direction away from a first side contact 22 formed by the outer peripheral surface of the columnar connecting part 16. In a state in which the resin cap 24 protrudes toward the tip side in the press-fitting direction from the cylindrical connecting part 18, the second side contact 56 comes into press-contact with the first side contact 22 by the elastic restoring force of the cylindrical connecting part 18.