An improved automatic locking retractor for use with a seatbelt system designed to operate with improved reliability while having a simplified structure. An improved control mechanism is provided for governing the locking of the seatbelt system when appropriate. The control mechanism is a control plate which cooperates with a latch plate which in turn cooperates with the take-up reel of the seatbelt system. Movement of the control plate controls the movement of a locking lever which selectively locks the latch plate to lock the take-up reel when appropriate.