A control system in a straddle-type vehicle including a vehicle body, front and rear wheels (2, 3), comprising: a slip suppressing condition determiner section (91, 92) which can determine whether or not a suppressing condition used to suppress a slip of one of the front and rear wheels (2, 3) is met, during driving of the vehicle; characterized in that the control system further comprises: a load distribution changing section (4, 18) which can change a ground load distribution between the front and rear wheels (2, 3) during driving of the vehicle; a load distribution control section (90, 93, 100) which can control the load distribution changing section (4, 18) to make the ground load of the one of the front and rear wheels (2, 3) greater, when the slip suppressing condition determiner section (91, 92) determines that the suppressing condition is met, than when the slip suppressing condition determiner section (91, 92) determines that the suppressing condition is not met; wherein the load distribution changing section (4, 18) is an attitude changing section which changes an attitude of the vehicle body around a pitching axis during driving of the vehicle; and the load distribution control section (90, 93, 100) can control the attitude changing section (4, 18) to change the attitude of the vehicle body to increase the ground load of the one of the front and rear wheels (2, 3) by inclining the vehicle body around the pitching axis either in a forward direction towards the front wheel or in a rearward direction towards the rear wheel. a slip suppressing condition determiner section (91, 92) which can determine whether or not a suppressing condition used to suppress a slip of one of the front and rear wheels (2, 3) is met, during driving of the vehicle; characterized in that the control system further comprises: a load distribution changing section (4, 18) which can change a ground load distribution between the front and rear wheels (2, 3) during driving of the vehicle; a load distribution control section (90, 93, 100) which can control the load distribution changing section (4, 18) to make the ground load of the one of the front and rear wheels (2, 3) greater, when the slip suppressing condition determiner section (91, 92) determines that the suppressing condition is met, than when the slip suppressing condition determiner section (91, 92) determines that the suppressing condition is not met; wherein the load distribution changing section (4, 18) is an attitude changing section which changes an attitude of the vehicle body around a pitching axis during driving of the vehicle; and the load distribution control section (90, 93, 100) can control the attitude changing section (4, 18) to change the attitude of the vehicle body to increase the ground load of the one of the front and rear wheels (2, 3) by inclining the vehicle body around the pitching axis either in a forward direction towards the front wheel or in a rearward direction towards the rear wheel. a load distribution changing section (4, 18) which can change a ground load distribution between the front and rear wheels (2, 3) during driving of the vehicle; a load distribution control section (90, 93, 100) which can control the load distribution changing section (4, 18) to make the ground load of the one of the front and rear wheels (2, 3) greater, when the slip suppressing condition determiner section (91, 92) determines that the suppressing condition is met, than when the slip suppressing condition determiner section (91, 92) determines that the suppressing condition is not met; wherein the load distribution changing section (4, 18) is an attitude changing section which changes an attitude of the vehicle body around a pitching axis during driving of the vehicle; and the load distribution control section (90, 93, 100) can control the attitude changing section (4, 18) to change the attitude of the vehicle body to increase the ground load of the one of the front and rear wheels (2, 3) by inclining the vehicle body around the pitching axis either in a forward direction towards the front wheel or in a rearward direction towards the rear wheel.