PROBLEM TO BE SOLVED: To eliminate the need for a locking operation of a lock operation tool and prevent reduction in operation accuracy due to forgetting of the operation of the lock operation tool when locking displacement of a top link bracket for a traction implement.SOLUTION: A tractor comprises a top link bracket 8 for a traction implement for connecting the traction implement controlled to be raised and lowered according to a traction load, and a top link bracket 9 for a tillage implement for connecting the tillage implement controlled to be raised and lowered according to a tillage depth. The top link bracket 8 for the traction implement has a traction load detection function displaced according to the traction load of the traction implement. The top link bracket 9 for the tillage implement comprises a lock part 30 which is a detachable type mounted to the top link bracket 8 for the traction implement when connecting the tillage implement, and locks the displacement of the top link bracket 8 for the traction implement when mounted to the top link bracket 8 for the traction implement.SELECTED DRAWING: Figure 8
