A circuit board connector apparatus includes a housing, a terminal, and a reinforcing fitting. The housing includes a protruding wall that protrudes in a height direction, a peripheral wall that protrudes in the height direction and surrounds the perimeter of the protruding wall, and a receiving portion between the protruding wall and the peripheral wall, the receiving portion being recessed in the height direction. The reinforcing fitting includes a first and a second portion extending toward the terminal along at least a length portion of the peripheral wall in a state of each being connected to an end portion placed in a width portion of the peripheral wall and in a state of being spaced apart in the height direction from each other. The second portion is located on a side closer in the height direction to a mounting surface than the first portion, and at the same position as an outer end of the first portion, or inward of the outer end in the housing, in a width direction.