Webbing take-up device

A webbing take-up device comprising:

• a spool that is rotated in a pull-out direction by a webbing being pulled out;
• a rotation body that is rotated in accompaniment with the rotation of the spool;
• an actuation member that is provided at the rotation body and that is actuated when the rotation body is rotated in the pull-out direction with an acceleration equal to or greater than a predetermined value;
• a regulating member that, when actuated, regulates rotation of the spool in the pull-out direction;
• a sensor holder that is disposed to face the rotation body, and that engages with the actuation member when the actuation member is actuated whereby the regulating member is actuated;
• and
• a tilt restricting portion that is disposed on the rotation body, that projects further toward a sensor holder side than an end surface at the sensor holder side of the rotation body, which end surface is disposed at an outer side in a radial direction of the rotation body than a place at which the actuation member and the sensor holder are engaged, and that restricts tilt of the rotation body with respect to an axial direction of the rotation body by being brought into contact with the sensor holder.