To provide a current detection device which is easily manufacturable and improves safety and quality, while performing surely rotation stop of a bolt mounted on a terminal.

The current detection device 100 includes: a first fixing part 112 fixed to wiring on the battery 200 side, and connected electrically; a second fixing part 114 having a harness 300 fixed thereto, and connected electrically; a bus bar 110; a resister formed integrally with the bus bar 110 or separately therefrom; a circuit board 120 loaded with a current detection circuit for detecting a current flowing in the resister; and a case 130 storing the resister and the circuit board 120. The second fixing part 114 has a board-like member in which a through-hole is formed, and a bolt 115 inserted into the through-hole, wherein at least a part of the side face of a head part 115A of the bolt 115 is formed flatly, and a portion where a part of the board-like member is bent is allowed to abut on the flat side face.