To provide a connection unit that can connect even when pitches of reinforcements differ from each other; moreover, is tough against impacts and soon.

The connection unit J1 is provided with a pair of connection members 10. Each connection member 10 includes a nut part 11 to be screwed in each screw reinforcement 1 and a flange 12 set on one end of the nut part 11. The flanges 12 of these connection members 10 are joined together by bolts 13 and nuts 14, thereby connecting two screw reinforcements 1.