There is provided a webbing take-up device including: a spool to which an end of webbing is anchored and that takes up the webbing by rotating in a take-up direction; a lock portion that restricts rotation of the spool in a pullout direction, in a coupled state capable of transmitting rotation force to the spool; a sensor portion that actuates in a rapid vehicle deceleration state in which a vehicle is being decelerated with a deceleration of a specific value or greater, a state in which the spool is rapidly rotated with an acceleration of a specific value or greater in the pullout direction, or a combination thereof; a drive portion that rotates the spool in the take-up direction by forward driving force output and that actuates the sensor portion; and a clutch portion that couples the spool and the lock portion by actuation of the sensor portion.