There is provided a pluggable module having grooves, on lateral faces, for latching with a cage and engaging portions for detachment, wherein the module body is detached from the cage by using a module detaching unit which is inserted along the grooves and which locks the engaging portions of the module body in the length direction. Further, there is provided a detaching jig including: latch release portions which are inserted between the pluggable module and the cage; lock portions which allow the pluggable module to be locked in the detaching direction; and a handle portion for detaching the pluggable module from the cage.