A board connector includes a receptacle (11) fittable to a mating housing (100) and a fixing member (40) having a board fixing portion (42) to be fixed to a circuit board (90) and a receptacle fixing portion (41) connected to the board fixing portion (42) and to be fixed to the receptacle (11). The receptacle (11) includes a side wall (17) arranged on a plate surface of the circuit board (90) and extending along a rising direction from the plate surface. An opening (25) penetrates the side wall (17) in a wall thickness direction. The receptacle fixing portion (41) of the fixing member (40) is arranged along an opening surface of the opening (25).