A board connecting connector includes a board retaining portion and a terminal retaining portion. The board retaining portion is configured to retain or accommodate a board, and the terminal retaining portion is configured to retain or accommodate terminals. When the board retaining portion and the terminal retaining portions are in a state of fitting to each other, terminal portions provided on a board surface of the board and contact portions of the terminals contact to each other. The board retaining portion includes a fitting fixing portion and a board supporting portion. The fitting fixing portion is provided on a contacting side where the terminal portions of the board contact with the contact portions of the terminals, so as to press the board to secure therein. The board supporting portion is provided at a place other than the contacting side and can support the board.