Coupling connector

A coupling connector comprising:

• a first connector comprising:
• a first connector housing;
• a terminal accommodation chamber provided in the first connector housing for disposing a plurality of terminals therein;
• and
• a leakage prevention wall for dividing the terminal accommodation chamber into divided terminal chambers for the respective terminals, the leakage prevention wall constituting a bulkhead between the divided terminal chambers adjacent to each other;
• and
• a second connector comprising:
• a second connector housing;
• a plurality of terminal cavity block portions provided in the second connector housing for accommodating terminals inside, the terminal cavity block portions being arranged to be individually inserted into the divided terminal chambers;
• and
• a mating recess provided between the terminal cavity block portions adjacent to each other for the leakage prevention wall to be inserted therein;
• and
• a water invasion preventing mechanism provided between the leakage prevention wall and the mating recess for preventing water from entering therebetween when the first connector housing of the first connector and the second connector housing of the second connector are mated with other.