Patent ID: 7364438

Claim:
An electrical connection box comprising: a case having an opening portion; a circuit board positioned in said case; a connector including a connector housing, wherein the connected is assembled to said case so that the connector housing is positioned in said opening portion, and fittable to a counterpart connector; a facing wall portion formed in an inner peripheral edge of said opening portion in said case positioned to face an outer peripheral surface of said connector housing; a rib that protrudes from at least one of the outer peripheral surface of said connector housing and said facing wall portion of said case toward the other, and extends in a gap between the outer peripheral surface of said connector housing and said facing wall portion in a direction perpendicular to a fitting direction of said counterpart connector; and a rib receiving groove that is formed in the other of the outer peripheral surface of said connector housing and said facing wall portion, the rib receiving groove structured to receive the rib, wherein the rib includes a plurality of ribs and said rib receiving groove includes a plurality of rib receiving grooves, further wherein the plurality of ribs and rib receiving grooves are provided in a line in a fitting direction of said counterpart connector in the gap between the outer peripheral surface of said connector housing and said facing wall portion.