Connector housing

A connector housing (11) is provided to prevent a retainer (15) from inadvertently moving from a partial locking position to a full locking position. The retainer (15) can be held in a partial locking position where the retainer (15) is located at a shallow insertion position in a hollow portion (14a) and permits the insertion and withdrawal of terminal fittings (T). The retainer (15) also can be in a full locking position (P3) where the retainer (15) is deeper in the hollow portion (14a) to lock the terminal fittings (T) so as not to come out of cavities. There are first and second partial locking positions (P1 and P2) of the retainer (15) at different depths in an inserting direction. A holding force for partially locking the retainer (15) in the housing main body (12) is set larger in the first partial locking position (P1) than in the second partial locking position (P2) before the full locking position (P3).