Connector with aligning plate

The invention provides a connector with an aligning plate, which can maintain engagement of the aligning plate and provisional locking arms. The connector 1 with an aligning plate, includes a connector housing including a pair of provisional locking arms 19 which hold the aligning plate at a provisional locking position, and the aligning plate 3 includes provisional locking portions 26 which engage with the pair of provisional locking arms 19. The connector housing 2 and the aligning plate 3 are provided with plural recesses 14 and plural projections 27 which are mutually engageable and which restrict a warp of the aligning plate 3.