A webbing take-up device comprising: a spool that takes up a webbing by rotating in a take-up direction, and that rotates in a pull-out direction opposite to the take-up direction by the webbing being pulled out; a motor that rotates a motor output shaft by driving; a first rotation force transmission mechanism that is capable of transmitting rotation force between the motor output shaft and the spool, and that is capable of rotating the spool in the take-up direction by being input with rotation force of the motor output shaft in a first direction; and a second rotation force transmission mechanism that is capable of transmitting rotation force between the motor output shaft and the spool, and that is capable of rotating the spool in the take-up direction by being input with rotation force of the motor output shaft in a second direction opposite to the first direction; characterized in that the webbing take-up device further comprises: a cut-off section (60, 62, 64) adapted to cut off transmission of rotation load along a rotation force transmission route from the second rotation force transmission mechanism to the spool via the first rotation force transmission mechanism due to the rotation load in the pull-out direction becoming a predetermined value or greater; wherein the motor is adapted to resist the rotation load during transmission of the rotation load, and to suppress transmission of the rotation load along the rotation force transmission route in a case in which the rotation load is less than the predetermined value, wherein the motor is further adapted such that the predetermined value of the rotation load is a product of a gear ratio of transmitting rotation force from the spool to the motor output shaft via the second rotation force transmission mechanism and a maximum value of a cogging torque of the motor, wherein the cut-off section (60, 62, 64) is adapted to cut off the transmission of the rotation load to the spool when the value of the pull-out direction rotation force of the spool is greater than or equal to the product of the gear ratio when transmitting rotation from the spool to the cut-off section (60, 62, 64), and a maximum frictional force between a portion on a spool side and the cut-off section (60, 62, 64). a spool that takes up a webbing by rotating in a take-up direction, and that rotates in a pull-out direction opposite to the take-up direction by the webbing being pulled out; a motor that rotates a motor output shaft by driving; a first rotation force transmission mechanism that is capable of transmitting rotation force between the motor output shaft and the spool, and that is capable of rotating the spool in the take-up direction by being input with rotation force of the motor output shaft in a first direction; and a second rotation force transmission mechanism that is capable of transmitting rotation force between the motor output shaft and the spool, and that is capable of rotating the spool in the take-up direction by being input with rotation force of the motor output shaft in a second direction opposite to the first direction; a cut-off section (60, 62, 64) adapted to cut off transmission of rotation load along a rotation force transmission route from the second rotation force transmission mechanism to the spool via the first rotation force transmission mechanism due to the rotation load in the pull-out direction becoming a predetermined value or greater; wherein the motor is adapted to resist the rotation load during transmission of the rotation load, and to suppress transmission of the rotation load along the rotation force transmission route in a case in which the rotation load is less than the predetermined value, wherein the motor is further adapted such that the predetermined value of the rotation load is a product of a gear ratio of transmitting rotation force from the spool to the motor output shaft via the second rotation force transmission mechanism and a maximum value of a cogging torque of the motor, wherein the cut-off section (60, 62, 64) is adapted to cut off the transmission of the rotation load to the spool when the value of the pull-out direction rotation force of the spool is greater than or equal to the product of the gear ratio when transmitting rotation from the spool to the cut-off section (60, 62, 64), and a maximum frictional force between a portion on a spool side and the cut-off section (60, 62, 64).