A cell wiring module includes a first unit holding one side of a connection member in a connection direction on a first base plate that extends along the connection member; and a second unit holding the other side of the connection member in the connection direction on a second base plate that extends along the connection member. Sliding occurs in the connection direction of the connection member between the connection member and at least one of the first unit and the second unit. The first base plate that extends to a second base plate side and the second base plate that extends to a first base plate side extend to such positions that the connection member is not exposed on an single cell side in an area between the first base plate and the second base plate.