Traction control system and saddled vehicle

A traction control system according to an embodiment of the present invention includes: a yaw rate detector (33) configured to detect the yaw rate of a saddled vehicle (1) and a controller (31) configured to perform a traction control based on the yaw rate detected. In one embodiment, the controller (31) changes a slip value to be a threshold value at which the traction control is turned ON and OFF according to the yaw rate detected. In another embodiment, the controller (31) reduces the driving force through the traction control to a varying degree according to the yaw rate detected.