A board connector, comprising: a housing into which a mating connector is to be at least partly fitted from front; at least one mounting groove formed on at least one side surface of the housing; and at least one fixing fixture to be at least partly mounted into the mounting groove in an inserting direction while the plate surface thereof substantially moves along the side surface of the housing and a distal end portion of which is to be fixed to a board, wherein: at least one first projecting locking portion laterally projecting substantially along the plate surface at an upper end position, at least one bent locking portion bent outward substantially at a right angle with respect to the plate surface at an intermediate position and at least one second projecting locking portion laterally projecting substantially along the plate surface at a lower end position are arranged one above the other along the inserting direction on a lateral edge of the fixing fixture, and the mounting groove includes receiving surfaces (35; 36; 38) which respectively come into contact with the projecting locking portions (43; 45) and the bent locking portion to prevent further insertion movements of the locking portions (43; 45; 44). a housing into which a mating connector is to be at least partly fitted from front; at least one mounting groove formed on at least one side surface of the housing; and at least one fixing fixture to be at least partly mounted into the mounting groove in an inserting direction while the plate surface thereof substantially moves along the side surface of the housing and a distal end portion of which is to be fixed to a board, wherein: at least one first projecting locking portion laterally projecting substantially along the plate surface at an upper end position, at least one bent locking portion bent outward substantially at a right angle with respect to the plate surface at an intermediate position and at least one second projecting locking portion laterally projecting substantially along the plate surface at a lower end position are arranged one above the other along the inserting direction on a lateral edge of the fixing fixture, and the mounting groove includes receiving surfaces (35; 36; 38) which respectively come into contact with the projecting locking portions (43; 45) and the bent locking portion to prevent further insertion movements of the locking portions (43; 45; 44). at least one first projecting locking portion laterally projecting substantially along the plate surface at an upper end position, at least one bent locking portion bent outward substantially at a right angle with respect to the plate surface at an intermediate position and at least one second projecting locking portion laterally projecting substantially along the plate surface at a lower end position are arranged one above the other along the inserting direction on a lateral edge of the fixing fixture, and the mounting groove includes receiving surfaces (35; 36; 38) which respectively come into contact with the projecting locking portions (43; 45) and the bent locking portion to prevent further insertion movements of the locking portions (43; 45; 44). the mounting groove includes receiving surfaces (35; 36; 38) which respectively come into contact with the projecting locking portions (43; 45) and the bent locking portion to prevent further insertion movements of the locking portions (43; 45; 44).