The purpose of the present invention is to provide a tilling claw which makes it possible to smoothly switch the direction of movement of tilled soil between an inner ridge side and an outer ridge side as well as to reduce vibration of a tilling machine during tilling work, thereby offering the ability to suppress any increase in the horsepower load or increase in the load fluctuation of a tilling machine. In a state where tilling claws (20L, 20R) have been mounted onto a management machine (1), among forward-rotation furrowing side portions (22L, 22R) and reverse-rotation furrowing side portions (24L, 24R), an inner side surface of the forward-rotation furrowing side portions (22L, 22R) has formed inner curve surfaces (23L, 23R) that curve towards the inner side of a width direction (W) of a machine body (10) of the management machine (1) while going towards a distal end from mounting base section (21L, 21R) sides, and an outer surface of the reverse-rotation furrowing side portions (24L, 24R) has formed outer curve surfaces (25L, 25R) that curve towards the outer side of the width direction (W) of the machine body (10) while going towards the distal end from the mounting base section (21L, 21R) sides. Notches (27L, 27R) are formed on a distal end edge section.Le but de la présente invention est de fournir une griffe de labourage qui permet de commuter sans à-coups la direction de déplacement dun sol labouré entre un côté saillie intérieure et un côté saillie extérieure ainsi quà réduire les vibrations dune machine de labourage pendant le travail de labourage, offrant ainsi la capacité de supprimer toute augmentation de la charge cheval-vapeur ou une augmentation de la fluctuation de charge dune machine de labourage. Dans un état où des griffes de labourage (20L, 20R) ont été montées sur une machine de gestion (1), entre des parties latérales sillonneuses à rotation vers lavant (22L, 22R) et des parties latérales sillonneuses à rotation inverse (24L, 24R), une surf
